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 [Search a list of Patent Appplications for class 369]   CLASS 369,DYNAMIC INFORMATION STORAGE OR RETRIEVAL
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SECTION I - CLASS DEFINITION

A. This is the generic class for processes of and apparatus for the storage or retrieval of arbitrarily variable information (as defined in the glossary below) which is retained in a storage medium by variation of a physical characteristic thereof. The information is stored or retrieved by causing or sensing a variation of a physical characteristic of the storage medium by a transducer having relative motion along a continuous path.

(1) Note. The record carrier must have continuous physical extent over the path of movement and be able to store a time-varying information signal. Static or discrete systems are classified elsewhere (see References to Other Classes, below).
(2) Note. The characteristic variation is one which must be retrievable by a transducer. Such variation producing only a directly perceptible indication (e.g., a graph), is classified elsewhere (see References to Other Classes, below).

B. This class includes processes and apparatus for the copying or editing of a storage medium within the above definition limited to such copying or editing including a step of storage or retrieval by relative motion.

C. This class includes the record carrier, per se, having particular information storage structure.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

COMBINATIONS OF OTHER APPARATUS WHICH INCLUDE APPARATUS OF THIS CLASS

Significantly claimed subject matter external to this class, claimed in combination with apparatus under the class definition, is classified in the class appropriate to the external apparatus.

The combination of an audio signal producing device with the subject matter of this class is classified in this class, except the combination with telephone signal devices are classified elsewhere. (See References to Other Classes, below.)

Nominally claimed apparatus external to this class, claimed in combination with apparatus under the class definition, is classified herein. (See Subclass References to the Current Class, below.)

SUBCOMBINATIONS OF DYNAMIC INFORMATION STORAGE AND RETRIEVAL

This class includes elements and subcombinations peculiar to the subject matter of this class (e.g., a phonographic stylus and cartridge).

(1) Note. Subcombination devices of general utility such as piezoelectric transducers are classified elsewhere.

Electrical circuitry which may be used in dynamic storage or retrieval, but which is not unique thereto is found in the appropriate class for such circuitry.

Mechanisms forming subcombinations of storage or retrieval devices, are classified in the appropriate mechanical class.

DYNAMIC MAGNETIC INFORMATION STORAGE AND RETRIEVAL

Class 360 provides for information storage and retrieval by causing or sensing modification of a magnetic condition on a record. Class 360 is to be considered an integral part of Class 369 and follows the schedule hierarchy, retaining all pertinent definitions and class lines, thereof. Classification in Class 360 is evidenced by either explicit recitation or sole disclosure of magnetic structure.

ORGANIZATION OF THIS CLASS

For the organization of this class, see Subclass References to the Current Class, below.

SECTION III - SUBCLASS REFERENCES TO THE CURRENT CLASS

SEE OR SEARCH THIS CLASS, SUBCLASS:

1through 12, Combined with Independent Audio System, for a device of this class and an operatively related audio signal source of independent content. These subclasses may include specific magnetic storage or retrieval devices.
13.01through 18, Diverse Types of Storage and Retrieval, for devices having differing intended kinds of storage and retrieval. These subclasses may include specific magnetic storage or retrieval devices.
19through 52.1, Control Functions: for devices and processes for modifying or maintaining the storage or retrieval operation, other than for sequential storage medium selection.
53.1through 53.45, Monitoring of Condition: for devices which indicate a condition of a storage or retrieval device or a subcombination thereof.
59.1through 85, Special Purpose Devices: for devices designed for use with or control of diverse type devices, or particular processing of the information signal.
69+,for nominally claimed apparatus external to this class, claimed in combination with apparatus under the class definition.
99through 173, General Recording or Reproducing; for methods and devices which are concerned with either the physics of storage or retrieval or processing of the information signal.
174and 175, Signal Modification: for devices which are basically electronic in nature and are used to modify, correct, or insure the efficient storage or retrieval of information signals, and are not limited to any particular type of storage or retrieval.
176through 257, Dynamic Mechanism Subsystems: for mechanism subcombinations peculiar to storage or retrieval absent more than nominal information handling structure.
272,through 291, Structure of Storage Medium: for structure of the storage medium element having significant structure for carrying information.
292,Miscellaneous: for subject matter under the class definition and not found above.

SECTION IV - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

181Acoustics,   appropriate subclasses for nonelectrical sound wave handling systems and components.
235Registers,   for static or discrete systems. (Lines With Other Classes and Within This Class, "Static or Discrete Systems".
310Electrical Generator or Motor Structure,   subclasses 300+ for piezoelectric transducers, per se.
312Supports: Cabinet Structure,   subclasses 9.1+ for phonograph cabinets without storage or retrieval structure.
340Communications: Electrical,   subclass 692 for an alarm system having a sound reproducer.
346Recorders,   appropriate subclasses for storage of information on a medium in a directly human perceptible form.
346Recorders,   for variation producing only a directly perceptible indication (e.g., a graph). (Class Definition, (2) Note, above.)
352Optics: Motion Pictures,   subclasses 1+ for subject matter of this class combined with motion picture recording or projection.
353Optics: Image Projectors,   subclasses 15+ for image projectors with sound accompaniment.
355Photocopying,   subclasses 31 and 98 for copying optical sound records.
360Dynamic Magnetic Information Storage or Retrieval,   appropriate subclasses for magnetic storage or retrieval analogs to the subclasses following Class 18. (See Lines With Other Classes and Within This Class, "Dynamic Magnetic Information Storage and Retrieval," above).
365Static Information Storage and Retrieval,   for static or discrete systems. (Lines With Other Classes and Within This Class, "Static or Discrete Systems".
379Telephonic Communications,   subclasses 67.1+ for similar subject matter combined with a telephone system component; and other appropriate subclasses for electrical audio signal handling, in general. The combination of an audio signal producing device with the subject matter of this class (369) is classified in this class (369), except the combination with telephone signal devices are classified in Class 379, subclasses 67.1+. (Lines With Other Classes and Within This Class, "Combinations of Other Apparatus").
381Electrical Audio Signal Processing and Systems and Devices,   appropriate subclasses for electrical audio signal handling in general.
386Motion Video Signal Processing for Recording or Reproducing,   appropriate subclasses for recording television or video signal.
399Electrophotography,   subclass 10 for storage of data on the operation of an electrophotographic device (i.e., log report) and subclass 83 for job mode selection with memory.
455Telecommunications,   appropriate subclasses for radio devices.
505Superconductor Technology: Apparatus, Material, Process,   subclasses 150+ for high temperature (Tc > 30 K) superconducting material, particularly subclasses 170+ for dynamic information storage or retrieval.
704Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,   subclasses 200+ for speech signal processing involving data processing.
711Electrical Computers and Digital Processing Systems: Memory,   subclass 4 for addressing dynamic storage devices including address formation or manipulation and subclasses 111+ for data accessing and control techniques for dynamic storage devices in digital data processing systems.
850Scanning-Probe Techniques or Apparatus; Applications of Scanning-Probe Techniques, e.g., Scanning-Probe Microscopy [SPM],   subclass 62 for information storage or retrieval using scanning probe microscope.

SECTION V - GLOSSARY

INFORMATION OR INFORMATION SIGNAL

A time varying physical quantity representing desired intelligence, often an audible sound or an electrical signal.

RETRIEVAL

Production or reproduction of a stored information signal from the storage medium characteristics.

RECORD

(1) (noun) The pattern of modulation by the information signal of the variable storage medium characteristic. (2) (verb) To effect storage of an information signal. As these terms have the same spelling the terms "store", "storage medium", and variants thereof will be preferred usage in the schedule and definitions in order to avoid confusion.

RECORD CARRIER

A tangible object upon which an information signal is stored, synonymous with storage medium.

STORAGE

Retention of information in a permanent or semipermanent form, or establishing such retention.

STORAGE MEDIUM

An object having a characteristic which is, or may be, modified at positional increments in accordance with the time variation of information which is stored thereon.

TRACK OR STORAGE TRACK

A continuous path of an intelligence varied characteristic on the storage medium.

TRACKING

Following a storage track by a transducer assembly or a component thereof.

TRANSDUCER ASSEMBLY

The combination of an energy conversion device (transducer) and device coupling the energy conversion device to a storage medium so as to sense or to cause a variation of a characteristic therein.

SUBCLASSES

[List of Patents for class 369 subclass 1]    1COMBINED INDEPENDENT AUDIO SYSTEMS:
 This subclass is indented under the class definition.  Subject matter combined with another audio signal system capable of operating independently of the storage or retrieval device.
(1) Note. Such distinct apparatus includes public address systems or radios.
(2) Note. The apparatus may include an additional storage or retrieval device.
(3) Note. The storage or retrieval device may be of the magnetic type.

SEE OR SEARCH CLASS:

379Telephonic Communications,   subclasses 68+ for a dynamic audio signal recorder or reproducer combined with a telephone system or component thereof.
  
[List of Patents for class 369 subclass 2]    2Changeover between audio systems:
 This subclass is indented under subclass 1.  Subject matter having switching structure to selectively connect the independent audio systems.
  
[List of Patents for class 369 subclass 3]    3Fading between plural signals:
 This subclass is indented under subclass 2.  Subject matter wherein the switching structure includes a signal handling element which varies continuously over a period of time the ratio of two input signals to form a resultant signal which is composed solely of the first signal prior to the specified period and solely of the second signal subsequent to said period.
  
[List of Patents for class 369 subclass 4]    4Combining signals to form composite (e.g., mixing):
 This subclass is indented under subclass 1.  Subject matter wherein the independent audio signals are concurrently passed through a common signal handling element to produce a resultant of both signals.
(1) Note. The signals to be combined may be relatively or separately adjusted, and monitored to produce a desired resultant effect.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53+,for monitoring of a storage or retrieval system.
83,for editing of stored information, in general.
  
[List of Patents for class 369 subclass 5]    5One of systems having plural concurrent signal (e.g., stereophonic):
 This subclass is indented under subclass 1.  Subject matter wherein one of the systems provides a plurality of signals simultaneously.

SEE OR SEARCH THIS CLASS, SUBCLASS:

86+,for storage or retrieval systems for spatially related acoustic signals.

SEE OR SEARCH CLASS:

381Electrical Audio Signal Processing Systems and Devices,   subclasses 1+ circuitry, in general.
  
[List of Patents for class 369 subclass 6]    6Radio:
 This subclass is indented under subclass 1.  Subject matter including a system which converts radio frequency energy to audible energy.

SEE OR SEARCH CLASS:

455Telecommunications,   for radio devices, per se.
  
[List of Patents for class 369 subclass 7]    7Including recording from radio:
 This subclass is indented under subclass 6.  Subject matter wherein an audio signal output of the radio is connected to the storage input.
(1) Note. The connection is usually part of an overall selection of program sources for the loud speaker output.
  
[List of Patents for class 369 subclass 8]    8Oscillator modulated by retrieved information signal:
 This subclass is indented under subclass 6.  Subject matter including a source of oscillations controlled or otherwise modulated by the information retrieval device.
(1) Note. The oscillator is often a local oscillator in the radio circuit.

SEE OR SEARCH THIS CLASS, SUBCLASS:

129,for a mechanical retrieval controlled oscillator.
  
[List of Patents for class 369 subclass 9]    9Mechanical phonograph:
 This subclass is indented under subclass 6.  Subject matter wherein the radio and a mechanical phonograph are coupled by a common acoustical element.
  
[List of Patents for class 369 subclass 10]    10With common cabinet for cartridge or cassette:
 This subclass is indented under subclass 6.  Subject matter wherein the radio housing includes structure unitary therewith for receiving a housing including a storage medium.
  
[List of Patents for class 369 subclass 11]    11Including separable assembly:
 This subclass is indented under subclass 6.  Subject matter wherein (a) a radio is converted to a cartridge/cassette player by combining a cartridge/cassette module therewith, or (b) a cartridge/cassette player is converted to a radio by combining a radio module therewith.
(1) Note. A radio module includes a cartridge or cassette housing with radio circuitry therein.
  
[List of Patents for class 369 subclass 12]    12Cabinet details:
 This subclass is indented under subclass 6.  Subject matter including structural details of an enclosure surrounding the components of the radio and signal retrieval system.
(1) Note. The cabinet structure must include some specific detail of the combined system, or an element thereof, otherwise such structure is classified as a cabinet, per se.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75.11-82,for similar subject matter including only a storage or retrieval device.

SEE OR SEARCH CLASS:

174Electricity: Conductors and Insulators,   subclasses 50+ for boxes and housing limited by claimed structure to electrical use but having no characteristic limiting them to particular electrical equipment; and subclasses 250+ for printed circuit arrangements of general utility.
181Acoustics,   subclasses 148+ for a diaphragm mounted in a cabinet.
312Supports: Cabinet Structure,   subclasses 9.1+ for cabinets or enclosures especially designed to house phonograph instruments or records.
361Electricity: Electrical Systems and Devices,   subclasses 600+ for boxes and mountings in combination with electrical apparatus having no significant art limitation, or boxes and mounting in combination with plural diverse electrical apparatus.
  
[List of Patents for class 369 subclass 13.01]    13.01STORAGE OR RETRIEVAL BY SIMULTANEOUS APPLICATION OF DIVERSE TYPES OF ELECTROMAGNETIC RADIATION:
 This subclass is indented under the class definition.  Subject matter for information signal storage or retrieval by concurrent application of a plurality of forms of electromagnetic radiation to effect a storage medium modification or sensing, respectively.
(1) Note. For classification herein, a single storage or retrieval action (i.e., modification or sensing) must require the simultaneous application of the diverse types of electromagneticradiation. Concurrent application of diverse types of electromagnetic radiation to effect plural respective storage or retrieval actions is classified elsewhere. See search note below.
(2) Note. Nominal recitation of a plurality of forms of electro-magnetic radiation (e.g., the mere presence of the phrase "magneto-optic" or "opto-magnetic") is not sufficient for classification herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14,for concurrent application of diverse types of electromagnetic radiation to effect plural respective storage or retrieval actions.
  
[List of Patents for class 369 subclass 13.02]    13.02Magnetic field and light beam:
 This subclass is indented under subclass 13.01.  Subject matter wherein the simultaneous application of plurality of forms of electromagnetic radiation include a magnetic field and a light beam.
(1) Note. Nominal recitation of a magnetic field and a light beam (e.g., the mere presence of the phrase "magneto-optic" or "opto-magnetic" is not sufficient for classification herein.
  
[List of Patents for class 369 subclass 13.03]    13.03Initializing:
 This subclass is indented under subclass 13.02.  Subject matter including modification to return a storage medium to an original unmodified state.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13.38,for specific detail of a storage medium layer, which may be an initializing layer.
  
[List of Patents for class 369 subclass 13.04]    13.04Erasing:
 This subclass is indented under subclass 13.02.  Subject matter including modification to remove a stored information signal.
  
[List of Patents for class 369 subclass 13.05]    13.05Reading:
 This subclass is indented under subclass 13.02.  Subject matter wherein information is being retrieved by sensing the storage medium.
  
[List of Patents for class 369 subclass 13.06]    13.06By transferring magnetic domain between layers:
 This subclass is indented under subclass 13.05.  Subject matter wherein the storage medium includes segments of defined thickness and a magnetic orientation within a storage location of an information signal is transferred between the storage medium layers.
  
[List of Patents for class 369 subclass 13.07]    13.07Three or more magnetic layers:
 This subclass is indented under subclass 13.06.  Subject matter wherein there are three or more segments of defined thickness wherein each one has a magnetic aspect.
  
[List of Patents for class 369 subclass 13.08]    13.08Changing size of magnetic domain:
 This subclass is indented under subclass 13.07.  Subject matter wherein the magnetic domain area is modified.
  
[List of Patents for class 369 subclass 13.09]    13.09Changing size of magnetic domain:
 This subclass is indented under subclass 13.06.  Subject matter wherein the magnetic domain area is modified.
  
[List of Patents for class 369 subclass 13.1]    13.1Three or more magnetic states:
 This subclass is indented under subclass 13.02.  Subject matter wherein three or more magnetic orientations on the storage medium represent the information signal.
  
[List of Patents for class 369 subclass 13.11]    13.11Positioning of transducer assembly for storage or retrieval:
 This subclass is indented under subclass 13.02.  Subject matter wherein a transducer assembly is moved to a location where modification or sensing can be performed on a particular region or track of the storage medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

24.01through 42.01, for locating information on a storage medium, per se.
  
[List of Patents for class 369 subclass 13.12]    13.12Relative positioning of transducer assemblies:
 This subclass is indented under subclass 13.02.  Subject matter wherein a magnetic field transducer assembly is moved to a location relative to a light beam transducer assembly.
  
[List of Patents for class 369 subclass 13.13]    13.13Integral transducers:
 This subclass is indented under subclass 13.02.  Subject matter wherein the optical and magnetic transducers are mounted integrally.
  
[List of Patents for class 369 subclass 13.14]    13.14Magnetic field generation:
 This subclass is indented under subclass 13.02.  Subject matter wherein at least one step or element for producing the magnetic field is particularly described.
(1) Note. The magnetic field can be modulated by an information signal or controlled to have a particular magnitude.
  
[List of Patents for class 369 subclass 13.15]    13.15Leakage magnetic field:
 This subclass is indented under subclass 13.14.  Subject matter wherein the magnetic field generation includes escape of the magnetic field through a breach.
(1) Note. The generation may include compensation of the leaked magnetic field during storage and the compensation may be during or after magnetic field generation.
(2) Note. The generation may include utilization of the leaked magnetic field for storage.
  
[List of Patents for class 369 subclass 13.16]    13.16Overwriting:
 This subclass is indented under subclass 13.14.  Subject matter wherein the modification includes replacing a stored information signal with another information signal.
  
[List of Patents for class 369 subclass 13.17]    13.17Magnetic field transducer assembly:
 This subclass is indented under subclass 13.14.  Subject matter wherein at least one element within a magnetic field transducer assembly is particularly described.
  
[List of Patents for class 369 subclass 13.18]    13.18Permanent magnet:
 This subclass is indented under subclass 13.17.  Subject matter wherein the magnetic field is generated using a piece of magnetic material that retains its magnetism after it is removed from a magnetic field.
  
[List of Patents for class 369 subclass 13.19]    13.19Rotating magnet:
 This subclass is indented under subclass 13.18.  Subject matter wherein the magnet is capable of movement about an axis.
  
[List of Patents for class 369 subclass 13.2]    13.2Operative location positioning of transducer assembly:
 This subclass is indented under subclass 13.17.  Subject matter wherein a transducer assembly is moved into or out of a location where modification or sensing can be effected.
  
[List of Patents for class 369 subclass 13.21]    13.21During load or unload of the storage medium:
 This subclass is indented under subclass 13.2.  Subject matter wherein the positioning occurs during movement of the storage medium into or out of an operative location.

SEE OR SEARCH THIS CLASS, SUBCLASS:

75.21,for loading a storage medium onto a turntable, per se.
  
[List of Patents for class 369 subclass 13.22]    13.22Magnetic field generating circuit:
 This subclass is indented under subclass 13.14.  Subject matter wherein the magnetic field is generated using a closed path capable of being followed by an electric current.
  
[List of Patents for class 369 subclass 13.23]    13.23Conductor coil:
 This subclass is indented under subclass 13.22.  Subject matter wherein the circuit includes a wound spiral of two or more turns of insulated wire used to introduce inductance into the storage medium.
  
[List of Patents for class 369 subclass 13.24]    13.24Light beam generation:
 This subclass is indented under subclass 13.02.  Subject matter wherein at least one step or element for producing the light beam is particularly described.
(1) Note. The light beam can be modulated by an information signal or controlled to have a particular magnitude.
  
[List of Patents for class 369 subclass 13.25]    13.25Overwriting:
 This subclass is indented under subclass 13.24.  Subject matter wherein the modification includes replacing a stored information signal with another information signal.
  
[List of Patents for class 369 subclass 13.26]    13.26Setting light beam power level:
 This subclass is indented under subclass 13.24.  Subject matter wherein a desired light beam magnitude is generated.
  
[List of Patents for class 369 subclass 13.27]    13.27Based on referenced test signal:
 This subclass is indented under subclass 13.26.  Subject matter wherein the magnitude is generated based on a signal that is stored and subsequently retrieved for an evaluating purpose.
  
[List of Patents for class 369 subclass 13.28]    13.28Multiple light beams:
 This subclass is indented under subclass 13.24.  Subject matter wherein a plurality of light beams is generated.
  
[List of Patents for class 369 subclass 13.29]    13.29Polarized light beam:
 This subclass is indented under subclass 13.24.  Subject matter wherein a direction of the electric field component of the light beam is modified.
  
[List of Patents for class 369 subclass 13.3]    13.3Plural polarization:
 This subclass is indented under subclass 13.29.  Subject matter wherein the light beam includes more than one direction of the electric field component.
(1) Note. The plural polarization can be S and P polarization components of a light beam.
  
[List of Patents for class 369 subclass 13.31]    13.31Linear polarization:
 This subclass is indented under subclass 13.29.  Subject matter wherein the electric field component is oriented in one direction.
  
[List of Patents for class 369 subclass 13.32]    13.32Light beam transducer assembly:
 This subclass is indented under subclass 13.24.  Subject matter wherein at least one element within a light beam transducer assembly is particularly described.
  
[List of Patents for class 369 subclass 13.33]    13.33Near field optic:
 This subclass is indented under subclass 13.32.  Subject matter wherein the light beam transducer is placed at a closest distance to the storage medium.
(1) Note. The "closest distance" is less than or equal to a half wavelength of the laser beam.
  
[List of Patents for class 369 subclass 13.34]    13.34In compact size assembly:
 This subclass is indented under subclass 13.02.  Subject matter wherein an aspect of an apparatus is reduced in size.
  
[List of Patents for class 369 subclass 13.35]    13.35Specific detail of recording medium:
 This subclass is indented under subclass 13.02.  Subject matter having at least one element of the storage medium particularly described.
(1) Note. A storage medium, per se (i.e., not claimed in combination with application of a magnetic field and a light beam) is classified elsewhere. See search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

275.2,for magneto-optic storage medium, per se, with specific detail of information bearing track structure.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclasses 817 through 825.1for magneto-optic storage medium, per se, with specific composition of materials or physical chemistry; and subclass 848.9 for magneto-optic media disk substrate, per se, with specific composition of materials or physical chemistry.
  
[List of Patents for class 369 subclass 13.36]    13.36In protective jacket:
 This subclass is indented under subclass 13.35.  Subject matter wherein the storage medium is surrounded by a protective enclosure.

SEE OR SEARCH THIS CLASS, SUBCLASS:

77.11and 77.21, for storage medium protective jackets, per se.
  
[List of Patents for class 369 subclass 13.37]    13.37Tape or card:
 This subclass is indented under subclass 13.35.  Subject matter wherein the storage medium is a continuous narrow, flexible strip or of flat geometric form.
(1) Note. Magnetic storage on or retrieval from a card not involving a light beam is not classified herein. See search note below.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 2 for magnetic storage on or retrieval from a card having diverse utility.
  
[List of Patents for class 369 subclass 13.38]    13.38Specific detail of layer (e.g., bias or initializing layers, etc.):
 This subclass is indented under subclass 13.35.  Subject matter having an aspect of a segment of defined thickness of the storage medium particularly described.
(1) Note. The layer can be a bias layer, initializing layer, cut-off layer, heat-sink layer, or shield layer.
  
[List of Patents for class 369 subclass 13.39]    13.39Plural distinct storage layers:
 This subclass is indented under subclass 13.38.  Subject matter including more than one segment of defined thickness for distinct storage of information signals.
(1) Note. The plural distinct storage layers can be on opposite sides of the storage medium.
  
[List of Patents for class 369 subclass 13.4]    13.4Plural layers having particular order:
 This subclass is indented under subclass 13.38.  Subject matter including more than one segment of defined thickness having particularly described arrangement.
  
[List of Patents for class 369 subclass 13.41]    13.41Plural magnetic layers (e.g., recording and reproducing layers):
 This subclass is indented under subclass 13.38.  Subject matter including more than one segment of defined thickness wherein each one has a magnetic aspect.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclasses 817 through 825.1for magneto-optic storage medium, per se, with specific chemical composition or physical chemistry.
  
[List of Patents for class 369 subclass 13.42]    13.42Three or more magnetic layers (e.g., recording, intermediate, and reproducing layers, etc.):
 This subclass is indented under subclass 13.41.  Subject matter wherein there are three segments, each having a magnetic aspect.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclasses 819 through 819.4for magneto-optic storage medium having a unit structure of three or more differing magnetic layers in series, per se, having a specific chemical composition or physical chemistry.
  
[List of Patents for class 369 subclass 13.43]    13.43In-plane magnetization layer:
 This subclass is indented under subclass 13.42.  Subject matter wherein a segment has magnetic orientation in a direction parallel to a surface of the storage medium.
  
[List of Patents for class 369 subclass 13.44]    13.44Exchange-coupling magnetization layer:
 This subclass is indented under subclass 13.42.  Subject matter including a segment for interacting with another segment to induce a magnetic orientation.
  
[List of Patents for class 369 subclass 13.45]    13.45Rare earth or metal alloy:
 This subclass is indented under subclass 13.42.  Subject matter wherein the segment includes a metallic element of atomic numbers 57 through 71 or a homogeneous mixture of electropositive elements.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclasses 822.3 through 822.5for magneto-optic storage medium stock, per se, having rare earth in single magneto-optic magnetic layer.
  
[List of Patents for class 369 subclass 13.46]    13.46Temperature or coercivity:
 This subclass is indented under subclass 13.42.  Subject matter wherein the aspect involves the degree of heat or magnetic sensitivity of the segment.
(1) Note. The temperature can be room temperature, Curie temperature, or a compensated temperature.
  
[List of Patents for class 369 subclass 13.47]    13.47Magnetic domain wall:
 This subclass is indented under subclass 13.42.  Subject matter wherein the aspect involves a boundary between magnetic domains of the segment.
(1) Note. The aspect may involve a boundary position or energy level.
  
[List of Patents for class 369 subclass 13.48]    13.48In-plane magnetization layer:
 This subclass is indented under subclass 13.41.  Subject matter wherein a segment has magnetic orientation in a direction parallel to a surface of the storage medium.
  
[List of Patents for class 369 subclass 13.49]    13.49Exchange-coupling magnetization layer:
 This subclass is indented under subclass 13.41.  Subject matter including a segment for interacting with another segment to induce a magnetic orientation.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclasses 817 through 825.1for magneto-optic storage medium, per se, having a specific chemical composition or physical chemistry.
  
[List of Patents for class 369 subclass 13.5]    13.5Rare earth or metal alloy:
 This subclass is indented under subclass 13.41.  Subject matter wherein the segment includes a metallic element of atomic numbers 57 through 71 or a homogeneous mixture of electropositive elements.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclasses 822.3 through 822.5for magneto-optic storage medium stock, per se, having rare earth in single magneto-optic magnetic layer.
  
[List of Patents for class 369 subclass 13.51]    13.51Temperature or coercivity:
 This subclass is indented under subclass 13.41.  Subject matter wherein the aspect involves the degree of heat or magnetic sensitivity of the segment.
(1) Note. The temperature can be room temperature, Curie temperature, or a compensated temperature.
  
[List of Patents for class 369 subclass 13.52]    13.52Magnetic domain wall:
 This subclass is indented under subclass 13.41.  Subject matter wherein the aspect involves a boundary between magnetic domains of the segment.
(1) Note. The aspect may involve a boundary position or energy level.
  
[List of Patents for class 369 subclass 13.53]    13.53Thickness of layer:
 This subclass is indented under subclass 13.38.  Subject matter wherein the aspect is the width of the segment.
(1) Note. For example, thickness of substrate, dielectric, reflective, protective, or transmitting layer.
  
[List of Patents for class 369 subclass 13.54]    13.54Recording mark dimension:
 This subclass is indented under subclass 13.35.  Subject matter wherein the element is a distinct storage location of the information signal on the storage medium and the shape and size of the distinct storage location is particularly described.
(1) Note. The recording mark has a particular dimension (i.e., shape and size) that is caused by application of the magnetic field and light beam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

275.4,for specific detail of storage medium pit structure, per se.
  
[List of Patents for class 369 subclass 13.55]    13.55Land or groove track:
 This subclass is indented under subclass 13.35.  Subject matter wherein the element is a continuous narrow raised surface or channel on the storage medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

275.4,for specific detail of storage medium groove structure, per se.
  
[List of Patents for class 369 subclass 13.56]    13.56STORAGE DIFFERENT FROM RETRIEVAL (E.G., OPTICAL RECORDING AND MAGNETIC REPRODUCTION):
 This subclass is indented under the class definition.  Subject matter wherein storage medium sensing for signal retrieval is diverse from storage medium modification for signal storage.
(1) Note. The term "diverse" refers to physically different changes (e.g., magnetic, optical, mechanical).
(2) Note. For classification herein, the diverse types of storage and retrieval must be claimed together. Alternative embodiments of an invention claimed separately are classified elsewhere.
  
[List of Patents for class 369 subclass 14]    14SIMULTANEOUS DIVERSE TYPES OF STORAGE OR RETRIEVAL:
 This subclass is indented under the class definition.  Subject matter for information signal storage by concurrent diverse types of storage medium modification, or information signal retrieval by concurrent diverse types of storage medium sensing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

93+,for plural, spatially distinct tracks stored or retrieved by the same type of storage or retrieval.
  
[List of Patents for class 369 subclass 15]    15ALTERNATIVE DIVERSE TYPES OF STORAGE OR RETRIEVAL:
 This subclass is indented under the class definition.  Subject matter for information signal storage by selection of one of diverse types of storage medium modification, or for the information signal retrieval by selection of one of diverse types of storage medium sensing.
(1) Note. Exemplary of such subject matter would be a recording or reproducing device for an elongate web record carrier having both magnetic and radiation transducers which may be alternatively switched into a circuit for use with either a photos:graphic or magnetic tape.
  
[List of Patents for class 369 subclass 16]    16MECHANICAL PRODUCTION OF OPTICAL STORAGE TRACK:
 This subclass is indented under the class definition.  Subject matter in which information is mechanically recorded onto a storage medium to produce variations in the transmissivity or reflectivity of the storage medium.
(1) Note. This subject matter often includes mechanical cutting of an opaque layer covering the storage medium.
(2) Note. This subject matter often includes mechanical cutting of an opaque layer covering the storage medium.

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13.02through 13.56, for this subject matter combined with claimed optical reading of the storage medium.
127+,for mechanical information storage, in general.
  
[List of Patents for class 369 subclass 17]    17TRACK CONVERSION:
 This subclass is indented under the class definition.  Subject matter including changing from a first type to a second type of track having the same signal content on the same storage medium.
(1) Note. Included herein is conversion from an optical track to a magnetic track.

SEE OR SEARCH THIS CLASS, SUBCLASS:

85,for copying a sound track onto a separate storage medium of a different type.
  
[List of Patents for class 369 subclass 18]    18OPTICAL READING OF MECHANICAL RECORD:
 This subclass is indented under the class definition.  Subject matter including retrieval by optical sensing of a mechanically recorded track.
(1) Note. Included herein are devices with photosensitive pickups for grooved records.
  
[List of Patents for class 369 subclass 19]    19CONTROL BY TIMER OR EXTERNAL EXTRANEOUS CONDITION:
 This subclass is indented under the class definition.  Subject matter including modification of an operating condition of the storage or retrieval device by apparatus responsive to time or to a condition other than an information parameter and external to the storage or retrieval device.

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47+,for control of a storage or retrieval operation by an information related parameter.
  
[List of Patents for class 369 subclass 20]    20By diverse art device:
 This subclass is indented under subclass 19.  Subject matter wherein the operating condition is controlled by apparatus having utility other than to perfect the storage or retrieval of a signal.
(1) Note. Detailed structure of the diverse art device is classified therewith.

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70,for control of diverse art device by storage or retrieval device.

SEE OR SEARCH CLASS:

340Communications: Electrical,   subclass 692 for a sound reproducer controlled by an alarm circuit.
434Education and Demonstration,   subclass 366 for abnormal condition simulating devices.
  
[List of Patents for class 369 subclass 21]    21In vehicle or elevator:
 This subclass is indented under subclass 19.  Subject matter wherein the storage or retrieval device is located in a movable passenger carrying compartment.
(1) Note. The controlling condition may be external to the vehicle.

SEE OR SEARCH CLASS:

340Communications: Electrical,   subclasses 139+ and 901+ for a communication device for an elevator or a vehicle, in general.
  
[List of Patents for class 369 subclass 22]    22Audible indicator:
 This subclass is indented under subclass 20.  Subject matter wherein the retrieval device is an audible reproducer, the content of the reproduced sound information being the value, generally numerical, of the time or condition to which the device responds.

SEE OR SEARCH CLASS:

379Telephonic Communications,   subclasses 67+ for similar subject matter in a telephone system.
  
[List of Patents for class 369 subclass 23]    23Talking clock:
 This subclass is indented under subclass 22.  Subject matter wherein the reproduced sound information is the time.

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368Horology: Time Measuring Systems or Devices,   subclass 63 for talking clocks including details of the time determining device.
  
[List of Patents for class 369 subclass 24.01]    24.01INFORMATION LOCATION OR REMOTE OPERATOR ACTUATED CONTROL:
 This subclass is indented under the class definition.  Subject matter including control of a storage or retrieval apparatus associated with physical location of the information on a storage medium or by an operator from a geographically spaced location.
(1) Note. This subclass does not include conventional control of signal processing such as on-off or volume controls.

SEE OR SEARCH CLASS:

340Communications: Electrical,   subclasses 1.1 through 16.1for electrical remote control transmission systems of general utility.
  
[List of Patents for class 369 subclass 25.01]    25.01Dictation or transcribing:
 This subclass is indented under subclass 24.01.  Subject matter particularly adapted to audibly record or reproduce the spoken intended contents of a document.
(1) Note. Examples of such adaptation are facilitating correction of stored audio information subsequent to storage and prior to retrieval or facilitating retrieval and modification thereof (e.g., backspacing).
(2) Note. A storage or retrieval device designated as for dictation or transcription, merely by name and absent structure therefor, is not classified herein. See search notes below.

SEE OR SEARCH CLASS:

379Telephonic Communications,   subclass 75 for remote dictation over a telephone.
704Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,   subclasses 270 through 278for particular application of speech signal processing which may include dictation or transcription.
  
[List of Patents for class 369 subclass 26.01]    26.01Privacy:
 This subclass is indented under subclass 25.01.  Subject matter with provision for preventing access to a dictation circuit or signal, or to the corresponding portions of the storage medium.
(1) Note. Examples include antibackspace tones and busy or in use signals.
  
[List of Patents for class 369 subclass 27.01]    27.01With access to or marking of specified locations (e.g., indexing):
 This subclass is indented under subclass 25.01.  Subject matter having structure to indicate the location of the current, or another designated, positioned increment along the storage medium.
(1) Note. The marking can be indexing.

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53.1through 53.45, for condition indication and monitoring of a storage or retrieval device, in general.
  
[List of Patents for class 369 subclass 28.01]    28.01By stored additional signal (e.g., tone):
 This subclass is indented under subclass 27.01.  Subject matter wherein the indication is given by a signal stored in the same manner as the information signal.
(1) Note. Such indicating signals are often reproduced as audible tones.
  
[List of Patents for class 369 subclass 29.01]    29.01Remote station:
 This subclass is indented under subclass 25.01.  Subject matter wherein the source of the audible information to be stored and control equipment is located remotely from and connected by an audible signal transmitting line to the storage device.
(1) Note. The source is often a telephone-type handset.
(2) Note. The connecting line is often similar to a telephone system connecting a plurality of audible information devices or of storage devices. However, classification is herein unless the system is recited to be a telephone system, or conversation is possible over such a system (e.g., between handsets).

SEE OR SEARCH CLASS:

379Telephonic Communications,   subclass 75 for remote dictation over a telephone system.
  
[List of Patents for class 369 subclass 29.02]    29.02Portable device:
 This subclass is indented under subclass 25.01.  Subject matter wherein the dictation or transcribing is performed using a device that is operational while being carried or moved.
  
[List of Patents for class 369 subclass 30.01]    30.01Selective addressing of storage medium (e.g., programmed access):
 This subclass is indented under subclass 24.01.  Subject matter wherein the control function includes storage on or retrieval from a designated storage medium element or portion thereof.
(1) Note. The term "random access" is sometimes used for such device. However, such usage should be carefully distinguished from random selection or indexing, or selection absent prior designation, which is not classified herein. See search notes below.
(2) Note. The selective addressing can be a programmed access.
(3) Note. The storage medium can be one of a plurality of storage medium elements (e.g., a jukebox).

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.4,for manual tone arm positioning adjuncts.
66and 98, for random selection or indexing, or selection absent prior designation.
178.01,for selection of storage medium absent designation.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclasses 78.01 through 78.15for random access of a magnetic record carrier.
434Education and Demonstration,   appropriate subclasses, particularly subclasses 322 through 364for nominal audio reproduction combined with recording of or controlling by operator response to instruction, or combined with audible description corresponding to displayed visual matter, other than a display or listing.
  
[List of Patents for class 369 subclass 30.02]    30.02Novelty device (e.g., talking doll):
 This subclass is indented under subclass 30.01.  Subject matter wherein the storage medium is associated with a novelty device.
(1) Note. Usually the novelty device constitutes the housing for a sound reproducer. Thus, a doll with a pull string by which the reproducer will emit one of several messages as selected by the direction of a pull on the string (e.g., a talking doll).

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63through 68, for similar subject matter absent selective addressing.

SEE OR SEARCH CLASS:

446Amusement Devices: Toys,   subclasses 299 and 302 for significant structure of an amusement device having sounding means such as phonograph or tape.
  
[List of Patents for class 369 subclass 30.03]    30.03Of optical storage medium:
 This subclass is indented under subclass 30.01.  Subject matter wherein the selective addressing is of a storage medium in which storage or retrieval is performed by using a light beam.
  
[List of Patents for class 369 subclass 30.04]    30.04Using recorded information indicative of storage medium contents:
 This subclass is indented under subclass 30.03.  Subject matter wherein the selective addressing includes using specific recorded information that identifies the information stored on the storage medium.
  
[List of Patents for class 369 subclass 30.05]    30.05Copying or editing:
 This subclass is indented under subclass 30.04.  Subject matter including retrieving information from one storage medium to subsequently store on another distinct storage medium or deleting, adding, or rearranging portions of a stored information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.12,for copying using a recorded or reproduced control signal and absent selective addressing.
47.13,for editing of stored information using a recorded or reproduced control signal and absent selective addressing.
83,for editing of stored information absent selective addressing.
84,for copying absent selective addressing.
  
[List of Patents for class 369 subclass 30.06]    30.06Plural storage medium elements (e.g., "juke box"):
 This subclass is indented under subclass 30.04.  Subject matter wherein the selective addressing is of one of a plurality of separate storage medium elements.
  
[List of Patents for class 369 subclass 30.07]    30.07Specified contents information modification processing:
 This subclass is indented under subclass 30.04.  Subject matter including detail of handling changing the contents information.
  
[List of Patents for class 369 subclass 30.08]    30.08Designating particular order of contents (e.g., sequential playing back by playlist):
 This subclass is indented under subclass 30.04.  Subject matter including using specific recorded information that identifies the order in which the information is to be selectively addressed.
(1) Note. The designating initiates sequential addressing operations of medium portions.
(2) Note. The order of contents can be in the form of a recorded playlist.
  
[List of Patents for class 369 subclass 30.09]    30.09Specified order of contents information modification processing:
 This subclass is indented under subclass 30.08.  Subject matter including detail of handling changing the order of contents information.
  
[List of Patents for class 369 subclass 30.1]    30.1Transducer movement control using recorded information indicative of location of information (e.g., track address):
 This subclass is indented under subclass 30.03.  Subject matter wherein the selective addressing includes control of a transducer movement using specific recorded information that identifies the position of the designated storage medium portion.
(1) Note. The recorded information can be a track address.
  
[List of Patents for class 369 subclass 30.11]    30.11Location information correction:
 This subclass is indented under subclass 30.1.  Subject matter including eliminating error in the location information.
  
[List of Patents for class 369 subclass 30.12]    30.12Particular track portion:
 This subclass is indented under subclass 30.1.  Subject matter wherein the storage medium portion is a track and the location information identifies a particular part of the track.
(1) Note. The particular part of the track can be a sector and the recorded information can be a sector address.
  
[List of Patents for class 369 subclass 30.13]    30.13Counting tracks traversed by transducer:
 This subclass is indented under subclass 30.1.  Subject matter wherein the storage medium portion is a track and the selective addressing includes indicating a number of tracks crossed by the transducer.
  
[List of Patents for class 369 subclass 30.14]    30.14Count correction:
 This subclass is indented under subclass 30.13.  Subject matter including eliminating error in the track count.
  
[List of Patents for class 369 subclass 30.15]    30.15Multiple movement control modes:
 This subclass is indented under subclass 30.1.  Subject matter including a plurality of distinct means or steps for controlling movement to the designated storage medium portion.
(1) Note. The control modes can be for coarse and fine seeking.
  
[List of Patents for class 369 subclass 30.16]    30.16Specific detail of terminating:
 This subclass is indented under subclass 30.15.  Subject matter including specific means or steps performed at the end of controlling movement to the designated storage medium portion.
  
[List of Patents for class 369 subclass 30.17]    30.17Transducer velocity control:
 This subclass is indented under subclass 30.1.  Subject matter including control of transducer movement speed to the designated storage medium portion.
  
[List of Patents for class 369 subclass 30.18]    30.18Electrical information signal processing:
 This subclass is indented under subclass 30.03.  Subject matter including detail of handling the information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

99through 175, for information signal processing absent selective addressing.
  
[List of Patents for class 369 subclass 30.19]    30.19Copying or editing:
 This subclass is indented under subclass 30.18.  Subject matter including retrieving information from one storage medium to subsequently store on another distinct storage medium or deleting, adding, or rearranging portions of a stored information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.12,for copying using a recorded or reproduced control signal and absent selective addressing.
47.13,for editing of stored information using a recorded or reproduced control signal and absent selective addressing.
83,for editing of stored information absent selective addressing.
84,for copying absent selective addressing.
  
[List of Patents for class 369 subclass 30.2]    30.2Plural storage medium elements:
 This subclass is indented under subclass 30.18.  Subject matter wherein the selective addressing is of one of a plurality of separate storage medium elements.
  
[List of Patents for class 369 subclass 30.21]    30.21Monitoring signal error or verification:
 This subclass is indented under subclass 30.18.  Subject matter including indicating the correctness or verification state of the information signal.
  
[List of Patents for class 369 subclass 30.22]    30.22Correction of error:
 This subclass is indented under subclass 30.21.  Subject matter including means or steps to eliminate an error.
  
[List of Patents for class 369 subclass 30.23]    30.23Buffering:
 This subclass is indented under subclass 30.18.  Subject matter including use of supplemental storage means for holding the information signal.
  
[List of Patents for class 369 subclass 30.24]    30.24Abnormal condition or changing mode of system:
 This subclass is indented under subclass 30.18.  Subject matter including a system operation condition whereby storage or retrieval is undesirable or a change in an operating mode of the system.
  
[List of Patents for class 369 subclass 30.25]    30.25Auxiliary information:
 This subclass is indented under subclass 30.18.  Subject matter wherein supplemental recorded or reproduced information is processed.
(1) Note. The auxiliary information includes subcode data (e.g., Q-data or N-data, address data, header, TOC, sync, or clock).
  
[List of Patents for class 369 subclass 30.26]    30.26Remote operating mode control:
 This subclass is indented under subclass 30.03.  Subject matter including remote actuated control of change of operating mode of the system.
  
[List of Patents for class 369 subclass 30.27]    30.27Electrical control signal processing:
 This subclass is indented under subclass 30.03.  Subject matter including detail of handling of an electrical signal which affects the operation of storage medium element or portion selection.
(1) Note. The electrical control signal is a signal other than a signal recorded on or reproduced from the storage medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30.04through 30.25, for selective addressing using or including processing of a signal recorded on or reproduced from the storage medium.

SEE OR SEARCH CLASS:

340Communications: Electrical,   subclasses 4.37 and 4.4 for similar subject matter absent structure detail of signal storage.
  
[List of Patents for class 369 subclass 30.28]    30.28Plural storage medium elements:
 This subclass is indented under subclass 30.27.  Subject matter wherein the selective addressing is of one of a plurality of separate storage medium elements.
  
[List of Patents for class 369 subclass 30.29]    30.29Matching control signal:
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal is compared to determine a close counterpart.
  
[List of Patents for class 369 subclass 30.3]    30.3Of information indicative of contents or particular order of contents:
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal includes specific information that identifies the information stored on the storage medium elements or identifies the order in which the information is to be selectively addressed.
(1) Note. The contents information can be an ID code or reference information (e.g., a bar code) or indicate a type of storage medium.
  
[List of Patents for class 369 subclass 30.31]    30.31For operation of storage medium gripper, accessor, or transfer member:
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal is processed to operate a device that holds or causes movement from one location to another of the storage medium.
  
[List of Patents for class 369 subclass 30.32]    30.32For record medium loading or ejecting:
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal is processed to cause movement of the storage medium from an operative location to an inoperative location.
  
[List of Patents for class 369 subclass 30.33]    30.33For radial array positioning of unitary plural storage medium carrier:
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal is processed to orient an integrated mechanical array which holds the storage medium elements in a nonparallel pattern or spacing, which pattern may have characteristic lines with a common center, such that the storage medium elements are readily accessible for selection.
(1) Note. The radial array can be a carousel.
  
[List of Patents for class 369 subclass 30.34]    30.34For linear array positioning of unitary plural storage medium carrier (e.g., horizontal or vertical positioning):
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal is processed to orient an integrated mechanical array which holds the storage medium elements in parallel along a common axis, which array is movable along such axis, such that the storage medium elements are readily accessible for selection.
  
[List of Patents for class 369 subclass 30.35]    30.35For relative positioning between storage medium elements:
 This subclass is indented under subclass 30.28.  Subject matter wherein the control signal is processed to provide a particular location for a storage medium relative to another storage medium.
  
[List of Patents for class 369 subclass 30.36]    30.36Abnormal condition or changing mode of system:
 This subclass is indented under subclass 30.27.  Subject matter including a system operation condition whereby storage or retrieval is undesirable or a change in an operating mode of the system.
  
[List of Patents for class 369 subclass 30.37]    30.37Of particular order of contents:
 This subclass is indented under subclass 30.27.  Subject matter wherein the control signal identifies the order in which the information is to be selectively addressed.
(1) Note. The order of contents is indicative of sequential addressing operations of medium portions.
(2) Note. The order of contents can be provided by a bar code.
  
[List of Patents for class 369 subclass 30.38]    30.38Plural optical storage media in library system:
 This subclass is indented under subclass 30.03.  Subject matter wherein multiple storage mediums are contained within a storage system for recording or reproducing purposes wherein storage medium drives contained therein are easily removed by the user from the storage system and are each encased within individual housing enclosures.
  
[List of Patents for class 369 subclass 30.39]    30.39Modular library system:
 This subclass is indented under subclass 30.38.  Subject matter wherein a housing of the storage system is divided into and contains distinct, prefabricated subsections that, when combined, form one or more operational storage systems.
  
[List of Patents for class 369 subclass 30.4]    30.4Plural media are discs stored in cartridges:
 This subclass is indented under subclass 30.38.  Subject matter wherein the multiple storage mediums are each a plate-shaped planar recording medium contained within a protective casing or sleeve for covering the recording medium during use.
  
[List of Patents for class 369 subclass 30.41]    30.41Having specified disc rack:
 This subclass is indented under subclass 30.4.  Subject matter including specifics of a disc cartridge housing that separates and stores the disc cartridges within the housing of the storage system.
  
[List of Patents for class 369 subclass 30.42]    30.42Having particular removable magazine:
 This subclass is indented under subclass 30.4.  Subject matter including specifics of a disc cartridge housing that holds multiple disc cartridges in a single contained unit wherein the disc cartridge housing is easily inserted into and ejected from the storage system by a user.
  
[List of Patents for class 369 subclass 30.43]    30.43Having specified picker:
 This subclass is indented under subclass 30.4.  Subject matter including specifics of a gripper assembly for selectively grasping user-selected disc cartridges and moving them within the storage system.
  
[List of Patents for class 369 subclass 30.44]    30.44Of carousel library system:
 This subclass is indented under subclass 30.43.  Subject matter wherein the gripper assembly is contained within a storage system which has a radial array of disc cartridges positioned so as to rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.45]    30.45Picker support structure (i.e., mechanism for moving picker):
 This subclass is indented under subclass 30.4.  Subject matter including specifics of a mechanism which guides and translates a gripper assembly used to transport the disc cartridges within the storage system.
  
[List of Patents for class 369 subclass 30.46]    30.46Having specified disc drive:
 This subclass is indented under subclass 30.4.  Subject matter including specifics of a disc recording/reproducing unit used to mount the disc cartridges during playback or recording of information from the disc cartridge.
  
[List of Patents for class 369 subclass 30.47]    30.47Drive moves into alignment with disc:
 This subclass is indented under subclass 30.46.  Subject matter wherein the disc recording/reproducing unit has a mechanism to move the disc recording/reproducing unit into position across from a selected disc cartridge to be recorded/reproduced.
  
[List of Patents for class 369 subclass 30.48]    30.48Having particular mechanism or slot for transferring disc into library from outside:
 This subclass is indented under subclass 30.4.  Subject matter including specifics of the transferring structure used to move the disc cartridge from the exterior of the storage system to inside the storage system.
  
[List of Patents for class 369 subclass 30.49]    30.49Linear vertical or horizontal array:
 This subclass is indented under subclass 30.4.  Subject matter wherein the storage system has one or more storage racks which store the disc cartridges within the storage system wherein the storage racks must be oriented either horizontally or vertically in a linear fashion.
  
[List of Patents for class 369 subclass 30.5]    30.5Carousel array:
 This subclass is indented under subclass 30.4.  Subject matter wherein the storage system has one or more storage racks which store the disc cartridges in a radial array so that the storage racks rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.51]    30.51Plural media are unprotected (i.e., discs that are not in cartridges):
 This subclass is indented under subclass 30.38.  Subject matter including specifics of the recording media wherein the recording media are devoid of any protective covering or casing (i.e., a naked disc).
  
[List of Patents for class 369 subclass 30.52]    30.52Having specified disc rack:
 This subclass is indented under subclass 30.51.  Subject matter including specifics of a disc storage array that stores and separates the discs inside the storage system.
  
[List of Patents for class 369 subclass 30.53]    30.53Having particular removable magazine:
 This subclass is indented under subclass 30.51.  Subject matter including specifics of a disc housing that holds multiple naked discs in a single contained unit wherein the disc housing must be easily inserted into and ejected from the storage system by a user.
  
[List of Patents for class 369 subclass 30.54]    30.54Mounting or locking magazine to library system:
 This subclass is indented under subclass 30.51.  Subject matter including specifics of how the removable disc housing is secured or maintained in a fixed position inside the storage system after insertion thereof into the storage system.
  
[List of Patents for class 369 subclass 30.55]    30.55Having specified picker:
 This subclass is indented under subclass 30.51.  Subject matter including specifics of a gripper assembly for selectively grasping user-selected naked discs and moving them within the storage system.
  
[List of Patents for class 369 subclass 30.56]    30.56Of carousel library system:
 This subclass is indented under subclass 30.55.  Subject matter wherein the gripper assembly is used within a storage system that has one or more storage racks which store the naked discs in a radial array of discs so that the storage racks rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.57]    30.57Picker support structure detail (i.e., mechanism for moving picker):
 This subclass is indented under subclass 30.51.  Subject matter including specifics of a mechanism for permitting a gripper assembly to transport the naked discs within the storage system.
  
[List of Patents for class 369 subclass 30.58]    30.58Having specified disc drive:
 This subclass is indented under subclass 30.51.  Subject matter including specifics of a disc recording/reproducing unit used to mount the naked discs during playback or recording of information from the naked disc.
  
[List of Patents for class 369 subclass 30.59]    30.59Drive moves into alignment with disc:
 This subclass is indented under subclass 30.58.  Subject matter wherein the disc recording/reproducing unit has a mechanism to move the disc recording/reproducing unit into position across from a selected naked disc to be recorded/reproduced.
  
[List of Patents for class 369 subclass 30.6]    30.6Having particular mechanism or slot for transferring disc into library from outside:
 This subclass is indented under subclass 30.51.  Subject matter including specifics of a transferring structure used to move the naked discs from the exterior of the storage system to inside the storage system.
  
[List of Patents for class 369 subclass 30.61]    30.61Linear vertical or horizontal array:
 This subclass is indented under subclass 30.51.  Subject matter wherein the storage system has one or more storage racks which store the naked discs within the storage system wherein the storage racks must be oriented either horizontally or vertically in a linear fashion.
  
[List of Patents for class 369 subclass 30.62]    30.62Carousel array:
 This subclass is indented under subclass 30.51.  Subject matter wherein the storage system has one or more storage racks which store the naked discs in a radial array so that the storage racks rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.63]    30.63Having particular cabinet:
 This subclass is indented under subclass 30.38.  Subject matter including specifics of an outer housing that contains the entire storage system therein.
  
[List of Patents for class 369 subclass 30.64]    30.64Plural optical storage media in disc changer:
 This subclass is indented under subclass 30.03.  Subject matter wherein multiple storage mediums are contained within a storage system for recording or reproducing purposes wherein storage medium drives contained therein are permanently contained within the storage system and are devoid of individual housings that protect each storage medium drive.
  
[List of Patents for class 369 subclass 30.65]    30.65Plural media are discs stored in cartridges:
 This subclass is indented under subclass 30.64.  Subject matter wherein the multiple storage mediums are each a plate-shaped planar recording medium contained within a protective casing or sleeve for covering the recording medium during use.
  
[List of Patents for class 369 subclass 30.66]    30.66Having specified stocker or internal magazine:
 This subclass is indented under subclass 30.65.  Subject matter including specifics of a disc cartridge housing that separates and stores the disc cartridges within the housing of the storage system.
  
[List of Patents for class 369 subclass 30.67]    30.67Stocker or internal magazine is adjustable or movable:
 This subclass is indented under subclass 30.65.  Subject matter including specifics of a disc cartridge storage rack that is movable within the storage system so as to move the entire storage rack of disc cartridges.
  
[List of Patents for class 369 subclass 30.68]    30.68Having particular removable magazine:
 This subclass is indented under subclass 30.65.  Subject matter including specifics of a disc cartridge housing that holds multiple disc cartridges in a single contained unit wherein the disc cartridge housing is easily inserted into and ejected from the storage system by a user.
  
[List of Patents for class 369 subclass 30.69]    30.69Mounting or locking magazine to disc changer:
 This subclass is indented under subclass 30.65.  Subject matter including details of how a disc cartridge container for holding a plurality of disc cartridges is secured within the storage system after insertion by the user from the outside.
  
[List of Patents for class 369 subclass 30.7]    30.7Having particular internal transfer mechanism for transferring disc while disc is inside of disc changer:
 This subclass is indented under subclass 30.65.  Subject matter including specifics of a transport assembly for selectively engaging user-selected disc cartridges and moving them within the storage system.
  
[List of Patents for class 369 subclass 30.71]    30.71Of carousel changer:
 This subclass is indented under subclass 30.7.  Subject matter wherein the transport assembly is contained within a storage system which has a radial array of disc cartridges positioned so as to rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.72]    30.72Having particular internal support structure for internal transfer mechanism:
 This subclass is indented under subclass 30.65.  Subject matter including details of a structural support mechanism that enables movement of a transport mechanism that transfers selected disc cartridges within the storage system.
  
[List of Patents for class 369 subclass 30.73]    30.73Having specified drive:
 This subclass is indented under subclass 30.65.  Subject matter including specifics of a disc recording/reproducing unit used to mount the disc cartridges during playback or recording of information from the disc cartridge.
  
[List of Patents for class 369 subclass 30.74]    30.74Movable drive:
 This subclass is indented under subclass 30.73.  Subject matter wherein the disc recording/reproducing unit has a mechanism to move disc recording/reproducing unit into position across from a selected disc cartridge to be recorded/reproduced.
  
[List of Patents for class 369 subclass 30.75]    30.75Having particular mechanism or slot for transferring disc into changer from outside:
 This subclass is indented under subclass 30.65.  Subject matter including specifics of transferring structure used to move the disc cartridge from the exterior of the storage system to inside the storage system.
  
[List of Patents for class 369 subclass 30.76]    30.76Plural media are unprotected (i.e., discs that are not in cartridges):
 This subclass is indented under subclass 30.64.  Subject matter including specifics of the recording media wherein each of the recording media are devoid of any protective covering or casing (e.g., a naked disc).
  
[List of Patents for class 369 subclass 30.77]    30.77Having specified stocker or internal magazine:
 This subclass is indented under subclass 30.76.  Subject matter including specifics of a naked disc housing that separates and stores multiple naked discs within the housing of the storage system.
  
[List of Patents for class 369 subclass 30.78]    30.78Stocker or internal magazine is adjustable or movable:
 This subclass is indented under subclass 30.76.  Subject matter including specifics of a naked disc storage rack that is movable within the storage system so as to move the entire storage rack of naked discs.
  
[List of Patents for class 369 subclass 30.79]    30.79In carousel changer:
 This subclass is indented under subclass 30.78.  Subject matter wherein the storage rack is contained within a storage system which has a radial array of naked discs positioned so as to rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.8]    30.8Positioning mechanism:
 This subclass is indented under subclass 30.79.  Subject matter including specifics of a mechanism for determining the orientation of the storage rack containing the radial array of naked discs so as to provide feedback on the particular location of the naked discs or the storage rack.
  
[List of Patents for class 369 subclass 30.81]    30.81Having disc reproduced while entirely in magazine:
 This subclass is indented under subclass 30.76.  Subject matter wherein the naked disc that is being played back must be maintained entirely with a naked disc housing that holds multiple naked discs in a single contained unit during the playback process.
  
[List of Patents for class 369 subclass 30.82]    30.82Having disc reproduced while partially in magazine:
 This subclass is indented under subclass 30.76.  Subject matter wherein the naked disc that is being played back is only fractionally removed from a naked disc housing that holds multiple naked discs in a single contained unit during the playback process.
  
[List of Patents for class 369 subclass 30.83]    30.83Having particular removable magazine:
 This subclass is indented under subclass 30.76.  Subject matter including specifics of a naked disc housing that holds multiple naked discs in a single contained unit wherein the naked disc housing is easily inserted into and ejected from the storage system by a user.
  
[List of Patents for class 369 subclass 30.84]    30.84Mounting or locking magazine to disc changer:
 This subclass is indented under subclass 30.76.  Subject matter including details of how a naked disc housing for holding a plurality of naked discs is secured within the storage system after insertion by the user from the outside.
  
[List of Patents for class 369 subclass 30.85]    30.85Having particular internal transfer mechanism for transferring disc while disc is inside of disc changer:
 This subclass is indented under subclass 30.76.  Subject matter including specifics of a transport assembly for selectively engaging user-selected naked discs and moving them within the storage system.
  
[List of Patents for class 369 subclass 30.86]    30.86Of a carousel changer:
 This subclass is indented under subclass 30.85.  Subject matter wherein the transport assembly is contained within a storage system which has a radial array of naked discs positioned so as to rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.87]    30.87Having specified internal support structure for internal transfer mechanism:
 This subclass is indented under subclass 30.76.  Subject matter including details of a structural support mechanism that enables movement of a transport mechanism that transfers selected naked discs within the storage system.
  
[List of Patents for class 369 subclass 30.88]    30.88Having specified drive:
 This subclass is indented under subclass 30.76.  Subject matter including specifics of a naked disc recording/reproducing unit used to mount the naked discs during playback or recording of information from the disc cartridge.
  
[List of Patents for class 369 subclass 30.89]    30.89Movable drive:
 This subclass is indented under subclass 30.88.  Subject matter wherein the disc recording/reproducing unit has a mechanism to move the disc recording/reproducing unit into position across from a selected naked disc to be recorded/reproduced.
  
[List of Patents for class 369 subclass 30.9]    30.9Having particular mechanism or slot for transferring disc into changer from outside:
 This subclass is indented under subclass 30.76.  Subject matter including specifics of transferring structure used to move the naked disc from the exterior of the storage system to inside the storage system.
  
[List of Patents for class 369 subclass 30.91]    30.91Of carousel changer:
 This subclass is indented under subclass 30.9.  Subject matter wherein the transferring structure is contained within a storage system which has a radial array of naked discs positioned so as to rotate about a central location or point.
  
[List of Patents for class 369 subclass 30.92]    30.92Plural trays:
 This subclass is indented under subclass 30.9.  Subject matter wherein the transferring structure used to move the naked discs from the exterior of the storage system must have two or more separate tray structures for transferring the naked discs.
  
[List of Patents for class 369 subclass 30.93]    30.93One tray for multiple discs:
 This subclass is indented under subclass 30.9.  Subject matter wherein the transferring structure used to move the naked discs from the exterior of the storage system contains only a single unitary tray structure that holds more than one naked disc for transport thereof.
  
[List of Patents for class 369 subclass 30.94]    30.94Loading mechanism:
 This subclass is indented under subclass 30.93.  Subject matter including specifics of a system of parts used to move the single tray structure from the exterior of the storage system to inside the storage system.
  
[List of Patents for class 369 subclass 30.95]    30.95Chucking mechanism:
 This subclass is indented under subclass 30.93.  Subject matter including specifics of a system of parts used to clamp a selected naked disc onto a recording/reproducing unit for the purpose of recording to or playing back the selected naked disc.
  
[List of Patents for class 369 subclass 30.96]    30.96Locking mechanism:
 This subclass is indented under subclass 30.93.  Subject matter including specifics of a system of parts used to firmly hold, secure, or immobilize the single tray structure while inside the storage system.
  
[List of Patents for class 369 subclass 30.97]    30.97Positioning mechanism:
 This subclass is indented under subclass 30.93.  Subject matter including specifics of a system of parts used to spatially orient the single tray structure while inside the storage system so as to be able to determine the location of any one of the multiple naked discs.
  
[List of Patents for class 369 subclass 30.98]    30.98Having single motor that drives multiple mechanisms:
 This subclass is indented under subclass 30.93.  Subject matter including specifics of an individual motor and its corresponding system of parts used to actuate more than one unit within the storage system (e.g., a single motor for actuating both a disc tray transferring system and a disc clamping system).
  
[List of Patents for class 369 subclass 30.99]    30.99One tray for single disc:
 This subclass is indented under subclass 30.9.  Subject matter wherein the transferring structure used to move the naked discs from the exterior of the storage system contains only a single unitary tray structure that holds only one naked disc for transport thereof.
  
[List of Patents for class 369 subclass 31.01]    31.01Having particular cabinet:
 This subclass is indented under subclass 30.64.  Subject matter including specifics of an outer housing that contains the entire storage system therein.
  
[List of Patents for class 369 subclass 32.01]    32.01Specified electrical information signal processing:
 This subclass is indented under subclass 30.01.  Subject matter including detail of handling the information signal.

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99through 175, for information signal processing absent selective addressing.
  
[List of Patents for class 369 subclass 33.01]    33.01Specified electrical control signal processing:
 This subclass is indented under subclass 30.01.  Subject matter including detail of handling of an electrical signal which affects the operation of storage medium element or portion selection.
(1) Note. The electrical control signal is a signal other than a signal recorded on or reproduced from the storage medium.

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32.01,for selective addressing including processing of a signal recorded on or reproduced from the storage medium.

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340Communications: Electrical,   subclasses 4.37 and 4.4 for similar subject matter absent structure detail of signal storage.
  
[List of Patents for class 369 subclass 34.01]    34.01Plural storage medium elements:
 This subclass is indented under subclass 33.01.  Subject matter wherein the selection is of one of a plurality of separate storage medium elements.
  
[List of Patents for class 369 subclass 35.01]    35.01Plural nontranslating storage elements (e.g., in situ):
 This subclass is indented under subclass 30.01.  Subject matter having plural storage elements wherein the transducing assembly produces all storage element selecting motion.
(1) Note. The transducing assembly may have associated structure for driving the storage element in use.
(2) Note. The storage elements have no motion other than that used for storage or retrieval.

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39.01,for a scanning turntable which moves the storage element from its nonselected position in a plural disc carrier.
  
[List of Patents for class 369 subclass 36.01]    36.01Unitary plural record carrier:
 This subclass is indented under subclass 30.01.  Subject matter wherein an integrated mechanical array holds the discs in some way that they are readily accessible for selection.
(1) Note. The array holding the discs may be referred to as a magazine.

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192.1,for this subject matter absent storage medium designation and cross reference thereto should not be made in the absence of a nonselective embodiment.

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318Electricity: Motive Power Systems,   subclasses 567 through 579for electric motor positioning systems not limited to the subject of this class as an end element or load.
  
[List of Patents for class 369 subclass 37.01]    37.01Radial array:
 This subclass is indented under subclass 36.01.  Subject matter wherein the mechanical array holds the storage discs in a nonparallel pattern or spacing, which pattern may have characteristic lines with a common center.
(1) Note. Either the array or retrieval station may move for selective positioning.
(2) Note. The diameter of each disc in a common plane may be seen to radiate from the same center.
(3) Note. The array classified here may be merely a segment or a portion, or an entire circumference.
(4) Note. Arrays of small groups of discs, possibly parallel within each group but spaced radially group to group, are classified here.

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192.1,for this subject matter absent storage medium designation and cross reference thereto should not be made in the absence of a nonselective embodiment.
  
[List of Patents for class 369 subclass 38.01]    38.01Moving linear array:
 This subclass is indented under subclass 36.01.  Subject matter wherein the mechanical array holds the storage discs in parallel along a common axis and which array is movable along such axis for positioning a selected disc adjacent a retrieval station.

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37.01,for arrays of small groups of discs, parallel within each group but spaced radially group to group.
192.1,for this subject matter absent storage medium designation and cross reference thereto should not be made in the absence of a nonselective embodiment.
  
[List of Patents for class 369 subclass 39.01]    39.01Scanning turntable:
 This subclass is indented under subclass 36.01.  Subject matter wherein the storage medium motion producer moves along a stationary array for positioning relative to a selected disc.
(1) Note. The storage medium motion producer may be a turntable of such small diameter as to permit access to both sides of a disc.

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192.1,for this subject matter absent storage medium designation and cross reference thereto should not be made in the absence of a nonselective embodiment.
  
[List of Patents for class 369 subclass 40.01]    40.01By manually actuated mechanism for movement of tone arm:
 This subclass is indented under subclass 30.01.  Subject matter including a hand-actuated linkage coupled to a tone arm for setting to a selected position on a storage disc.
  
[List of Patents for class 369 subclass 41.01]    41.01Of track on single storage medium:
 This subclass is indented under subclass 30.01.  Subject matter wherein the designated portion of the storage medium is a distinct path of information modulated variation on the surface thereof.
  
[List of Patents for class 369 subclass 42.01]    42.01By mechanical linkage:
 This subclass is indented under subclass 24.01.  Subject matter including a device having a plurality of relatively moving parts for transmitting a controlling force or motion from another location to the storage or retrieval location.
(1) Note. Examples of such devices are Bowden cables or pneumatic actuators.
  
[List of Patents for class 369 subclass 43]    43WITH SERVO POSITIONING OF TRANSDUCER ASSEMBLY OVER TRACK COMBINED WITH INFORMATION SIGNAL PROCESSING:
 This subclass is indented under the class definition.  Subject matter having closed-loop control of the alignment between the transducer assembly and the information storage track combined with handling of the information signal.
(1) Note. The servo corrects alignment error and, if necessary, provides tracking motion for the transducer assembly.

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220,for transducer support control of powered support drive having storage or retrieval absent information signal handling.

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360Dynamic Magnetic Information Storage or Retrieval,   subclasses 77.01+ for track centering on a magnetic record carrier.
  
[List of Patents for class 369 subclass 44.11]    44.11Optical servo system:
 This subclass is indented under subclass 43.  Subject matter wherein the servo positioning is controlled by a radiant energy transducer.
(1) Note. The transducer may be either an information sensing transducer or an auxiliary transducer. Incidental recitation of focusing or tracking, or a servo system therefor, is not enough to permit classification here.

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44.27,for recording systems with initialization/startup/changing modes concepts.
44.32,for recording systems with defect/abnormal condition concepts.
44.38,for a recording system claimed in a plural beam system.
47and 51, for optical information storage or retrieval systems where a pilot signal is used.
93+,for optical systems using plural distinct independent tracks.
100+,for optical systems with specific detail of information handling portion of system.

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250Radiant Energy,   subclasses 201.1+ for optical tracking devices in radiant energy systems, per se.
  
[List of Patents for class 369 subclass 44.12]    44.12Solid state optical element with plural dissimilar optical components (e.g., using i.c. block, etc.):
 This subclass is indented under subclass 44.11.  Subject matter including a block of material of an integrated chip, semiconductor or solid state nature with plural dissimilar optical components or at least one optical component with an additional electrical component combined therein.
(1) Note. Examples are acoustic beam deflector and tracking circuit are on the same block of material, or a diode laser and acoustic lens in the same block of material.
(2) Note. Plural lasers or lasing points of the same frequency/wavelength on a common substrate are not classified herein since they have similar structure, but may be classified in this Class, subclass 44.37 or 44.38. However, if they are of different structure (i.e. different laser types) combined in a common structure they are classified herein.

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44.37,or 44.38, for servo systems using plural beams.

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257Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),   subclasses 13 , 79 through 103 and 918 for incoherent light emitting injection luminescent devices, subclasses 80-85 for semiconductor light emitting sources combined with semiconductor light responsive devices, and subclasses 10, 11, 21, 53-56, 72, 113-118, 184 through 189, 225 through 234, 257, 258, 290 through 294, 414, and 431 through 466 for light responsive active semiconductor devices.
385Optical Waveguides,   subclass 14 for an integrated optical circuit and subclasses 129+ for a planar optical waveguide.
  
[List of Patents for class 369 subclass 44.13]    44.13Dithering or wobbling the beam or track:
 This subclass is indented under subclass 44.11.  Subject matter wherein a beam or track is dithered wobbled, undulated, vibrated, or oscillated along a track center line for tracking or focusing control.
  
[List of Patents for class 369 subclass 44.14]    44.14Optical head servo system structure:
 This subclass is indented under subclass 44.11.  Subject matter including structural detail of the mechanisms for focussing or tracking.
(1) Note. Optical head is defined as a device for producing a focused beam of light on a medium containing information and detecting the light reflected from the medium to determine the information content of the medium.

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359Optical: Systems and Elements,   subclasses 196.1 through 226.3and 819+ for optical heads in general, with or without servo system combination, when no recording/playback or combination with the recording medium is claimed.
  
[List of Patents for class 369 subclass 44.15]    44.15Elastic, flexible, pliant or spring support of lens or mirror:
 This subclass is indented under subclass 44.14.  Subject matter wherein an optical element is supported by some type of elastic, flexible, pliant, resilient or spring support for allowing or limiting motion in one or more various directions (e.g., elastic support holds lens or mirrors and permits focus motion but limits lateral motion, etc.).
(1) Note. A piezoelectric bender which supports the lens or mirror meets the definition and its flexible condition.
  
[List of Patents for class 369 subclass 44.16]    44.16Flat flexible support (e.g., parallel leaf springs, etc.):
 This subclass is indented under subclass 44.15.  Subject matter with planar means to limit or provide a limited direction of motion (e.g., support permits only one of focusing or tracking motion to occur, etc.).
  
[List of Patents for class 369 subclass 44.17]    44.17Optical head element with rotary motion:
 This subclass is indented under subclass 44.14.  Subject matter wherein an optical head element such as a lens or mirror pivots/rotates about its own axis or about a support axis in order to scan or focus on the track.
  
[List of Patents for class 369 subclass 44.18]    44.18Rotary headwheel or scanner (e.g., for use with arcuate, transverse or slant tracks, etc.):
 This subclass is indented under subclass 44.17.  Subject matter wherein an optical component rotales through a 360 degree motion to follow a track.
(1) Note. Slant tracts or tracks transverse to the storage medium motion are found on tape or card medium where the medium moves before or as the beam is directed across the medium.

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97,for systems using tracks transverse to a motion component.

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360Dynamic Magnetic Information Storage or Retrieval,   appropriate subclasses for magnetic rotary heads and headwheels and the combination with magnetic tape.
  
[List of Patents for class 369 subclass 44.19]    44.19Head element pivots on arm (e.g., optical head on disc arm etc.):
 This subclass is indented under subclass 44.17.  Subject matter including a support arm which rotates about a pivot point to drive the lens or mirror transverse to the track direction (e.g., optical lens or mirror is pivoted on a phonograph type arm which may provide both track accessing and tracking control, etc.).
  
[List of Patents for class 369 subclass 44.21]    44.21Lens or mirror pivots off center (e.g., on a shaft, etc.):
 This subclass is indented under subclass 44.17.  Subject matter wherein the support may or may not pivot about its own central axis, but the lens or mirror on this support is pivoted off center.
  
[List of Patents for class 369 subclass 44.22]    44.22Lens or mirror floats (e.g., magnetic field support or lens/mirror can freely float and pivot about its own axis, etc.):
 This subclass is indented under subclass 44.14.  Subject matter wherein the lens or mirror has no support and floats with potential freedom of motion in any direction, though a field such as a magnetic field which may limit and control its position and movement.
  
[List of Patents for class 369 subclass 44.23]    44.23Structure for shaping beam or causing astigmatic condition:
 This subclass is indented under subclass 44.14.  Subject matter having means to modify the cross-sectional profile or energy distribution of the beam or cause an astigmatic beam condition.
(1) Note. The phrase "shaping beam" is intended to include changing the intensity distribution characteristics or cross-sectional profile or size/diameter of the beam (e.g., for beam intensity control etc.) but not for routine focus control which inherently alters the beam size/diameter.
(2) Note. An "astigmatic" condition may be created by a cylindrical or unidirectional lens.
(3) Note. Astigmatic is defined as a spherical aberration.
  
[List of Patents for class 369 subclass 44.24]    44.24Means to mask or shield a portion of the beam:
 This subclass is indented under subclass 44.23.  Subject matter wherein a modification is performed by masking or shielding a cross-sectional portion of the beam.
(1) Note. The masking or shielding can be caused by one photodetector blocking a portion of the beam from falling onto another photodetector.

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44.42,where the servo system has arithmetic operations performed on plural detectors outputs and the servo system is responsive to a particular shape of the beam by virtue of the beam or detector being that shape.
  
[List of Patents for class 369 subclass 44.25]    44.25Servo signal compared to a reference signal:
 This subclass is indented under subclass 44.11.  Subject matter wherein a developed servo signal is compared to an external reference signal.

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44.27,if in an initialization/start-up or changing modes system.
44.34,if the reference signal is sampled and stored signal of an earlier servo signal.
  
[List of Patents for class 369 subclass 44.26]    44.26Servo system operation related to disc structure information format:
 This subclass is indented under subclass 44.11.  Subject matter wherein the operation of the servo system is in cooperation with an information arrangement, format, layout, pattern or track structure on the record medium.
(1) Note. The system can be, for example, a preformatted disc where tracking is turned on during preformatted regions and off during nonrecorded regions absent tracking data, or where servo operation is integral with or affected by a constant linear velocity disc format mode of operation, etc.
  
[List of Patents for class 369 subclass 44.27]    44.27Initialization/start-up or changing modes of system:
 This subclass is indented under subclass 44.11.  Subject matter wherein the servo system is affected by a change of mode in operation at the beginning of system operation or a change of mode during system operation.
(1) Note. "Random accessing" or indexing concepts may be classified herein if no specific "selective addressing" or feedback indication of arriving at a particular track address occurs.
(2) Note. The action taken by the servo system must be outside or beyond its normal routine ongoing continuous servo operation.
(3) Note. Varying the servo system control during a change between recording and playback or tracking modes due to the information format of the disc is classified above in subclass 44.26.
(4) Note. Examples of initialization/start-up are first track recording and track jumping or crossing during a random access type of operation.
(5) Note. Examples of mode change during operation are: switching between coarse/fine servo control as servo operation begins/changes modes, and the servo system responding to some user initiated operation.

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30.01through 41.01, for random accessing systems with selective addressing.
44.11,for generic recording systems without recitation of plural beams.
44.32,for recording systems with defect/abnormal condition concepts.
44.34,for sampling or digital techniques not associated with the criteria for subclass 44.27.
44.38,for a recording system claimed in a plural beam system.
  
[List of Patents for class 369 subclass 44.28]    44.28While track jumping or crossing:
 This subclass is indented under subclass 44.27.  Subject matter wherein the servo system is operative during a track jumping or track changing operation or as plural tracks are crossed.

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44.32,for the concept of "track crossing" when not normally associated with a deliberate action to jump across plural tracks such as during initial addressing or relocating to another track but where track crossing may be accidentally introduced by some abnormal condition as found in subclasses 44.32+ below.
  
[List of Patents for class 369 subclass 44.29]    44.29Servo loop gain/switching control:
 This subclass is indented under subclass 44.27.  Subject matter wherein the servo system continuously varies the servo gain or discretely switches in/out between servo loops.
(1) Note. Varying the gain may be some control operation not only to change the gain but to have the ability to vary it to keep it stable and prevent undesired varying, and varying the gain may be implemented with either active or passive (e.g., notch filter, etc.) elements.
(2) Note. Gain is defined as the ratio of output power to input power for a system or component.

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44.35,servo loop gain/switching control not associated with criteria for subclass 44.27.
  
[List of Patents for class 369 subclass 44.31]    44.31Recording:
 This subclass is indented under subclass 44.29.  Subject matter wherein an optical system is capable of a writing/recording operation.
(1) Note. An example is recording of a first track on a disc which is then used for tracking control for further tracks being recorded.

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44.33,for recording systems with a defect/abnormal condition.
44.38,for a recording system claimed in a plural beam system.
44.39,for generic recording systems without recitation of plural beams.
  
[List of Patents for class 369 subclass 44.32]    44.32Means to compensate for defect or abnormal condition:
 This subclass is indented under subclass 44.11.  Subject matter wherein the servo system structure or operation has means to avoid the servo system being affected by, or so that it is responsive to and corrects for an adverse situation.
(1) Note. Examples of conditions being corrected are disc defects, tilt, vibrations, shocks, impacts, skew to normal direction to the disc surface, vertical warp, jitter, eccentricity, beam variations or some condition outside of the ordinary servo operation condition, etc.

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44.11,for generic recording systems.
44.27,for recording systems with initialization/start-up/changing modes concepts.
44.38,for a recording system claimed in a plural beam system.
  
[List of Patents for class 369 subclass 44.33]    44.33Recording (e.g., inhibit recording upon defect, etc.):
 This subclass is indented under subclass 44.32.  Subject matter comprising a writing/recording system in combination with compensation means.

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44.31,for recording systems including initialization/start-up.
44.38,for a recording system claimed in a plural beam system.
44.39,for generic recording systems without recitation of plural beams.
  
[List of Patents for class 369 subclass 44.34]    44.34Sampling servo system:
 This subclass is indented under subclass 44.11.  Subject matter wherein an instantaneous value of a variable is obtained at regular intervals (e.g., sample and hold, be it analog or digital storage, etc.).
  
[List of Patents for class 369 subclass 44.35]    44.35Servo loop gain/switching control:
 This subclass is indented under subclass 44.11.  Subject matter wherein the servo system varies the servo gain or switches in/out or between servo loops.
(1) Note. Varying the gain also includes techniques for stabilization.
(2) Note. Varying the gain may be implemented with either active or passive (e.g., notch filter etc.) elements.
(3) Note. Gain is defined as the ratio of output power to input power of a system or component.
  
[List of Patents for class 369 subclass 44.36]    44.36Variable gain:
 This subclass is indented under subclass 44.35.  Subject matter wherein the servo gain is variable in a continuous manner as opposed to being switched between values, but may be combined with switching operations.
  
[List of Patents for class 369 subclass 44.37]    44.37Plural incident beams:
 This subclass is indented under subclass 44.11.  Subject matter wherein plural beams incident upon the recording medium are used, which may be one or more focusing, tracking, playback or recording beams.
(1) Note. Plurals beams created by splitting a single beam from the recording medium (e.g., etc., reflected beam is split and directed to plural detectors) is not classified here.
  
[List of Patents for class 369 subclass 44.38]    44.38Recording:
 This subclass is indented under subclass 44.37.  Subject matter wherein one of the beams is for writing/recording operations.

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44.31,for recording systems with initialization/start-up/changing modes concepts.
44.33,for recording systems with defect/abnormal condition concepts.
44.39,for generic recording systems without recitation of plural beams.
  
[List of Patents for class 369 subclass 44.39]    44.39Recording:
 This subclass is indented under subclass 44.11.  Subject matter comprising an optical system capable of a writing/recording operation.

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44.31,for recording systems with initialization/start-up.
44.33,for recording systems with defect/abnormal condition.
44.38,for a recording system claimed in a plural beam system.
  
[List of Patents for class 369 subclass 44.41]    44.41Arithmetic operation using plural photo-detectors:
 This subclass is indented under subclass 44.11.  Subject matter where more than one of addition, subtraction, multiplication, division is performed upon an output signals of plural photodetectors for the purpose of deriving one or more servo signals.
  
[List of Patents for class 369 subclass 44.42]    44.42Beam or detector is not rectangular or circular:
 This subclass is indented under subclass 44.41.  Subject matter wherein either the beam or the detector has a shape other than rectangular or circular.
  
[List of Patents for class 369 subclass 47.1]    47.1CONTROL OF STORAGE OR RETRIEVAL OPERATION BY A CONTROL SIGNAL TO BE RECORDED OR REPRODUCED:
 This subclass is indented under the class definition.  Subject matter wherein a control signal to be stored or retrieved acts upon a dynamic information storage and retrieval apparatus for modifying, adjusting, or maintaining an operating condition of the apparatus.
(1) Note. The control signal may be either an information signal or a distinct signal used for control purpose only.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19through 23, for control by timer or external extraneous condition.
24.01through 42.01, for control of a storage or retrieval apparatus by location of an information on a storage medium or by an operator-actuated remote control.
43through 44.42, for servo system combined with information signal processing.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   appropriate subclasses for similar subject matter limited to magnetic storage or retrieval, particularly subclass 27 for recording or reproducing an information signal and a control signal for controlling electronics of reproducer, subclasses 55-68 for general recording or reproducing, subclasses 69-78.15 for automatic control of a recorder mechanism, subclasses 79-80 for recorder control of an external device.
386Motion Video Signal Processing for Recording or Reproducing,   appropriate subclasses for recording and reproduction of television or video signal.
700Data Processing: Generic Control Systems or Specific Applications,   appropriate subclasses for digital data processing control systems, particularly subclass 94 for digital audio data processing system.
711Electrical Computers and Digital Processing Systems: Memory,   subclass 4 for addressing dynamic storage devices including address formation or manipulation, and subclasses 111-114 for data accessing and control techniques for dynamic storage device in a digital data processing system.
  
[List of Patents for class 369 subclass 47.11]    47.11Control of initiation of pause mode:
 This subclass is indented under subclass 47.1.  Subject matter wherein the control signal acts upon the apparatus to terminate a storage or retrieval operation and to place the apparatus in a temporarily inactive condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

24.01through 42.01, for control of a storage or retrieval apparatus by location of an information on a storage medium or by an operator-actuated remote control.
  
[List of Patents for class 369 subclass 47.12]    47.12For copying:
 This subclass is indented under subclass 47.1.  Subject matter wherein the control signal acts upon the apparatus to retrieve information from one storage medium to subsequently store the information on another distinct storage medium.
(1) Note. Copying without a control signal is excluded from this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.21,for indication of copying or editing protection.
84,for copying or duplication without a control signal.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 15 for record copying, subclass 60 for recording or erasing prevention.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 252 through 260for video copy identification protection, and subclass 279 for video copying or dubbing.
  
[List of Patents for class 369 subclass 47.13]    47.13For editing:
 This subclass is indented under subclass 47.1.  Subject matter wherein the control signal acts upon the apparatus to delete, add, or rearrange portions of a stored information signal.
(1) Note. Editing without a control signal is excluded from this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.21,for indication of copying or editing protection.
83,for editing of stored information without a control signal.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 13 for record editing, subclass 60 for recording or erasing prevention.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 278 through 290for video editing in a recording and reproduction device.
  
[List of Patents for class 369 subclass 47.14]    47.14By medium defect indicative control signal:
 This subclass is indented under subclass 47.1.  Subject matter wherein the dynamic information storage and retrieval apparatus is acted upon by a control signal that indicates a presence of an unrecordable region due to abnormality within a recordable region of a record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.17,for defect location indication.
53.24,for indication of an unrecorded location within a recordable region without a control signal.
53.35,for signal error correction or detecting.

SEE OR SEARCH CLASS:

714Error Detection/Correction and Fault Detection /Recovery,   subclass 769 for digital error correction in a dynamic data storage.
  
[List of Patents for class 369 subclass 47.15]    47.15Control of information signal processing channel:
 This subclass is indented under subclass 47.1.  Subject matter wherein an information signal processing circuitry is affected by the control signal for determining a parameter of an information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.31,for monitoring or testing of a stored or a retrieved information signal in a dynamic radiation information storage or retrieval system.
53.34,for monitoring or testing of a time related parameter, such as example, duty cycle, jitter, sync, etc., of an information signal.
53.44,for monitoring or testing of a stored or a retrieved information signal in a dynamic information storage or retrieval system.
59.1through 59.27, for dynamic storage or retrieval of a binary pulse train information signal.
124.01through 124.15, for specific information signal processing without a control signal.
174,for specific detail of information handling portion of system, including detail of signal modification.
  
[List of Patents for class 369 subclass 47.16]    47.16Of plural interrelated channels:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry includes distinct paths for several signal components of the information signal and determined parameters of such components have a definite relationship to each other.
  
[List of Patents for class 369 subclass 47.17]    47.17For removal of unwanted signal component:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry is affected by the control signal for removing a signal component that does not represent information from the information signal.
(1) Note. Such signal component includes, for example, distortion, noise, crosstalk, or intersymbol interference signal component.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.33,for a dynamic information storage or retrieval system having unwanted signal component indication.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclasses 263 through 277for error or fault detection and/or correction during video recording or reproduction.
714Error Detection/Correction and Fault Detection /Recovery,   appropriate subclasses.
  
[List of Patents for class 369 subclass 47.18]    47.18For interpolating or drop-out correcting:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry is affected by the control signal for generating additional or missing signal component and inserting such signal component into the information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.32,for drop-out indication of an information signal in a dynamic radiation information storage or retrieval system.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclasses 270 through 272for video drop-out detection and correction during video recording or reproduction.
  
[List of Patents for class 369 subclass 47.19]    47.19For modulating or demodulating:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry is affected by the control signal for a) converting an input signal into a recording signal by varying amplitude, frequency, or phase thereof using a carrier signal or b) extracting an input information signal from retrieved modulated signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124.04,for modulating or demodulating without a control signal.

SEE OR SEARCH CLASS:

329Demodulators,   appropriate subclasses for demodulators per se.
332Modulators,   appropriate subclasses for modulators per se.
340Communications: Electrical,   subclasses 13.1 through 13.36for a phase and frequency responsive selective system and subclasses 870.18-870.24 for a frequency or phase modulated telemetry system.
348Television,   subclass 724 for a modulator of a television transmitter circuitry.
360Dynamic Magnetic Information Storage or Retrieval,   subclasses 29 through 30for modulating and demodulating circuitry or techniques.
370Multiplex Communications,   subclasses 212 , 213 and 215 for pulse duration, pulse position, and phase modulation, respectively.
375Pulse or Digital Communications,   appropriate subclasses for pulse, amplitude or angle modulation in a receiver or transmitter of a digital communication system.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 307 through 312for frequency or phase modulation of color video signal during video recording or reproduction.
  
[List of Patents for class 369 subclass 47.2]    47.2For multiplexing or demultiplexing:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry is affected by the control signal for a) combining plural input signals into a recording signal such that at any instance of time one signal is presented at an output channel for recording or b) separating a retrieved multiplexed signal into plural output signals for reproducing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

59.27,for binary signal multiplexing or demultiplexing.
124.09,for multiplexing or demultiplexing without a control signal.

SEE OR SEARCH CLASS:

370Multiplex Communications,   subclasses 437+ for channel assignment techniques.
  
[List of Patents for class 369 subclass 47.21]    47.21Of sub-code information:
 This subclass is indented under subclass 47.2.  Subject matter wherein a supplemental information signal associated with a main information signal is multiplexed or demultiplexed.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124.07,for auxiliary information arrangement processing without a control signal.
  
[List of Patents for class 369 subclass 47.22]    47.22Having location identification information:
 This subclass is indented under subclass 47.21.  Subject matter wherein the supplemental information signal includes header or address information for identifying specific location on a record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.27,for control of the amplitude of an information signal using information retrieved from a designated medium location such as preformat, header, or reference region.
47.31,for phase, time or rate processing using a program or address signal.
47.47,for control of relative motion producing mechanism using a program or address signal.
47.54,for control of transducer assembly mechanism using a program or address signal.
53.17,for indication of a defect location on the record medium.
59.25,for format arrangement processing for an auxiliary information such as subcode information, headers of a binary pulse train information signal.
  
[List of Patents for class 369 subclass 47.23]    47.23For sequencing or switching:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry is affected by the control signal for a) producing a specific order of occurrence of portions of the information signal or b) selectively passing or routing of the information signal.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 22 for splitting an information signal for reproducing or for recording on plural distinct tracks.
386Motion Video Signal Processing for Recording or Reproducing,   subclass 333 for still mode recording, and subclass 341 for simultaneous recording of plural video signals.
  
[List of Patents for class 369 subclass 47.24]    47.24Between alternative processing channels:
 This subclass is indented under subclass 47.23.  Subject matter including means for selecting one among a plurality of alternative processing operations to be performed on the information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

59.13,for dynamic recording or reproducing of a binary pulse train information signal including a selection of one among a plurality of processing operations.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclass 225 for a motion camera recording device having a still mode function.
  
[List of Patents for class 369 subclass 47.25]    47.25For gain processing:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuitry is affected by the control signal for varying an amplitude of the information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

59.15,for binary signal gain processing.
124.1through 124.13, for gain processing without a control signal.
134,for particular amplification characteristic or signal control circuitry.

SEE OR SEARCH CLASS:

330Amplifiers,   for amplifiers per se.
360Dynamic Magnetic Information Storage or Retrieval,   subclass 46 for a head amplifier circuit, subclass 67 for specifics of an amplifier and subclass 68 for a recording amplifier.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 304 through 305for amplitude level control of a color video signal, and subclass 311 for amplitude modulation of luminance or chrominance of a color video signal during video recording or reproduction.
  
[List of Patents for class 369 subclass 47.26]    47.26Within a frequency band:
 This subclass is indented under subclass 47.25.  Subject matter wherein the gain processing is within a specified frequency range.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124.13,for a specific frequency range gain processing without a control signal.
  
[List of Patents for class 369 subclass 47.27]    47.27Using a reproduced information of specified preformat, header, or reference area:
 This subclass is indented under subclass 47.25.  Subject matter wherein the amplitude of the information signal is controlled using a readout signal from a designated medium location such as preformat, header, or reference region.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.22,for control of information signal processing channel for multiplexing or demultiplexing of information signal including location identification information.
47.31,for phase, time or rate processing using a program or address signal.
47.47,for control of relative motion producing mechanism using a program or address signal.
47.54,for control of transducer assembly mechanism using a program.
59.25,for format arrangement processing for an auxiliary information, such as block header or subcode information, of a binary pulse train information signal.
  
[List of Patents for class 369 subclass 47.28]    47.28For phase, timing, or rate processing:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuit is affected by the control signal for adjusting a time related parameter of the information signal such as phase, timing or rate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.34,for monitoring or testing of a time related parameter of the information signal.
59.2,for phase processing of a binary signal.
124.14,for phase processing without a control signal.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclass 207 for synchronization correction, subclass 221 for controlling speed of tape, subclass 222 for controlling speed of disk during video recording or reproduction, and subclass 274 for phase-crosstalk detection and/or correction.
  
[List of Patents for class 369 subclass 47.29]    47.29During retrieval at a dynamic retrieval rate different from storage rate:
 This subclass is indented under subclass 47.28.  Subject matter wherein the time related parameter is adjusted during retrieval at a relative head-to-medium reproducing speed that is faster or slower than a relative head-to-medium recording speed.
(1) Note. Included herein is CAV vs CLV dynamic recording or reproducing apparatus.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclasses 343 through 352for trick play processing in a video recording and reproduction device.
  
[List of Patents for class 369 subclass 47.3]    47.3While changing of system mode or dynamic retrieval rate:
 This subclass is indented under subclass 47.28.  Subject matter wherein the time related parameter is adjusted during a change in an operating mode of the apparatus or during a change in a relative head-to-medium reproducing speed.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclasses 201 through 222for synchronization or timing detection and/or correction in a recording and reproduction device.
  
[List of Patents for class 369 subclass 47.31]    47.31Using program or address signal:
 This subclass is indented under subclass 47.28.  Subject matter wherein the time relate parameter is adjusted using a signal indicative of a type or a specific location of stored information.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.22,for control of information signal processing channel for multiplexing or demultiplexing of an information signal including location identification information.
47.27,for control of an amplitude of the information signal using read out signal from a designated medium location such as preformat, header, or reference region.
47.47,for control of a relative motion producing mechanism using a program or address signal.
47.54,for control of a transducer assembly mechanism using a program or address signal.
59.25,for format arrangement processing for an auxiliary information of a binary pulse train information signal.
  
[List of Patents for class 369 subclass 47.32]    47.32Including static memory accessing:
 This subclass is indented under subclass 47.28.  Subject matter comprising a static memory access control operation for writing or reading the information signal.

SEE OR SEARCH CLASS:

345Computer Graphics Processing, Operator Interface Processing, and Selective Visual Display Systems,   subclass 507 for memory organization and structure for storing images to be displayed, and subclass 521 for interfacing between a graphics processor and a memory.
353Optics: Image Projectors,   subclass 25 for selective data retrieval of stored information viewed by a projection means.
365Static Information Storage and Retrieval,   appropriate subclasses for a type of static memory, particularly subclasses 189.011 through 225.7for read or write circuitry.
386Motion Video Signal Processing for Recording or Reproducing,   subclass 247 for utilizing a static memory as an auxiliary memory.
711Electrical Computers and Digital Processing Systems: Memory,   subclass 4 for addressing a dynamic storage device including address formation or manipulation, subclasses 111-114 for accessing a dynamic storage device of a digital data processing system.
  
[List of Patents for class 369 subclass 47.33]    47.33Including static memory fill level monitoring or controlling:
 This subclass is indented under subclass 47.32.  Subject matter wherein the access control operation includes a) means for monitoring an amount of stored information in a static memory to control writing or reading of the information signal, or b) means for maintaining a stored or vacant static memory space at a predetermined value.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclass 295 for memory space management during recording or reproduction operations.
707Data Processing: Database, Data Mining, and File Management or Data Structures,   subclasses 609 through 686for file or database maintenance; subclasses 813 through 820 for garbage collection; and, subclasses 821 through 831 for file management.
711Electrical Computers and Digital Processing Systems: Memory,   subclasses 170 through 173for memory configuration.
  
[List of Patents for class 369 subclass 47.34]    47.34Including static memory write address controlling:
 This subclass is indented under subclass 47.32.  Subject matter wherein the access control operation includes means for controlling addressing of the static memory such that written information are positioned in the static memory according to a predetermined relationship.

SEE OR SEARCH THIS CLASS, SUBCLASS:

30.01through 41.01, for subject matter related to designation or selection of storage medium to be used for storage and retrieval.
178.01,for dynamic mechanism subsystems for accessing multiple storage elements.

SEE OR SEARCH CLASS:

365Static Information Storage and Retrieval,   subclasses 189.01 through 225.7for read or write circuitry.
707Data Processing: Database, Data Mining, and File Management or Data Structures,   subclasses 609 through 686for file or database maintenance; subclasses 813 through 820 for garbage collection; and, subclasses 821 through 831 for file management
710Electrical Computers and Digital Data Processing Systems: Input/Output,   subclasses 22 through 28for Direct Memory Access (DMA).
711Electrical Computers and Digital processing Systems: Memory,   subclass 4 for addressing dynamic storage devices including address formation or manipulation and subclasses 111- 114 for data accessing and control techniques for dynamic storage device in a digital data processing system.
  
[List of Patents for class 369 subclass 47.35]    47.35For sampling, digital to analog or analog to digital converting:
 This subclass is indented under subclass 47.15.  Subject matter wherein the information signal processing circuit is affected by the control signal for a) obtaining instantaneous values of an information signal or b) transforming a succession of discrete digital values of an information signal into an analog signal of corresponding amplitude values or transforming a continuous information signal into discrete digital values.

SEE OR SEARCH THIS CLASS, SUBCLASS:

124.05,for sampling without a control signal.
59.21,for sampling or analog to digital converting of a binary information signal.

SEE OR SEARCH CLASS:

341Coded Data Generation or Conversion,   subclasses 122+ for sample or hold, subclasses 126-172 for analog to or from digital conversion.
386Motion Video Signal Processing for Recording or Reproducing,   subclass 327 for using an A/D or D/A converter for video processing during recording operation.
  
[List of Patents for class 369 subclass 47.36]    47.36Mechanism control by the control signal:
 This subclass is indented under subclass 47.1.  Subject matter wherein a mechanical operating condition is controlled by the control signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

19through 23, for control by timer or external extraneous condition.
24.01through 42.01, for control of a storage or retrieval apparatus by physical location of an information on a storage medium or by an operator-actuated remote control.
70,for control of a diverse art device.
176through 271, for dynamic mechanism subsystem, particularly subclasses 231-233 for mechanism responsive to a control structure on a storage medium sensed by transducer assembly support, and subclasses 233-243 for mechanism condition or storage medium responsive control.

SEE OR SEARCH CLASS:

226Advancing Material of Indeterminate Length,   subclass 9 for control means responsive to indicia carried by auxiliary record (e.g., tape or card), and subclasses 10-45 for material responsive control means.
242Winding, Tensioning, or Guiding,   subclasses 324 through 358.1for means for unwinding and rewinding a machine convertible information carrier; e.g., a magnetic tape, particularly subclasses 333-333.7 for automated stop or reversal control for the carrier, and subclasses 334-334.6 for a carrier speed or tension control.
318Electricity: Motive Power Systems,   appropriate subclasses, particularly subclasses 560 through 688for positional servo systems.
360Dynamic Magnetic Information Storage or Retrieval,   subclasses 69 through 78.15for automatic control of a recorder mechanism, and subclasses 79-80 for recorder control of an external device such as slide or movie projectors.
  
[List of Patents for class 369 subclass 47.37]    47.37Control of spiral track spacing (e.g., signal variable pitch):
 This subclass is indented under subclass 47.36.  Subject matter wherein the mechanical operating condition is controlled to adjust a displacement between adjacent tracks during storage of an information signal.
(1) Note. Such adjustment is often necessary for high values of signal amplitude when recording lateral groove.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.38through 47.48, for controlling of relative motion producing mechanism.
47.49through 47.54, for controlling of transducer assembly mechanism.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclasses 71 through 74.7for controlling the record.
  
[List of Patents for class 369 subclass 47.38]    47.38Control of relative motion producing mechanism:
 This subclass is indented under subclass 47.36.  Subject matter wherein relative motion between a transducer assembly and a record medium is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.37,for controlling of spiral track spacing.
47.49through 47.54, for controlling of transducer assembly mechanism.
53.3,for indicating, monitoring, or testing of a relative motion producing mechanism of a dynamic radiation storage or retrieval system.
53.43,for indicating, monitoring, or testing of a relative motion producing mechanism of a dynamic storage or retrieval system.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclasses 71 through 74.7for controlling the record, and subclasses 75-78.15 for controlling the head.
  
[List of Patents for class 369 subclass 47.39]    47.39During initialization or start-up:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled while starting system operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.27,for optical servo positioning system affected by a start-up mode or a change of mode during system operation.
47.55,for mechanism control during a start-up mode or a change of mode during system operation.
53.37,for condition indicating, monitoring or testing of a dynamic radiation storage or retrieval system during a start-up mode or a change of mode during system operation.
53.45,for condition indicating, monitoring or testing of a dynamic storage or retrieval system during a start-up mode or a change of mode during system operation.
  
[List of Patents for class 369 subclass 47.4]    47.4Responsive to change in transduced location:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled as a recording or reproducing head is moved from one track to another or from one zone to another.
(1) Note. The zone can include one or more tracks.
(2) Note. The relative motion control must have a predetermined, non-arbitrary relationship to the transduced location.
(3) Note. For the relative motion control that is due to a change in a type of transduced information and having an arbitrary relationship to the transduced location, see search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.41,for relative motion control that is due to a change in a type of transduced information and having an arbitrary relationship to transduced location.
53.29,for monitoring of a transducer assembly mechanism of a dynamic radiation storage or retrieval system to indicate a transduced location.
53.39,for monitoring of a transducer assembly mechanism of a dynamic storage or retrieval system to indicate a transduced location.
  
[List of Patents for class 369 subclass 47.41]    47.41Responsive to change in transduced information characteristic:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled in response to a change in a type of a transduced information among a plurality of information types.
(1) Note. The plurality of information types includes for example, address or header information, TOC, audio, video, CAV, CLV.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.4,for relative motion control in response to a change in transduced location.
53.29,for monitoring of a transducer assembly mechanism of a dynamic radiation storage or retrieval system to indicate a transduced location.
53.39,for monitoring of a transducer assembly mechanism of a dynamic storage or retrieval system to indicate a transduced location.
  
[List of Patents for class 369 subclass 47.42]    47.42Responsive to stand-by or pause mode operation:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled in response to the apparatus being placed in an inactive condition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.37,for condition indicating, monitoring, or testing of start up mode or changing system mode of a dynamic radiation storage or retrieval system.
53.45,for condition indicating, monitoring, or testing of start up mode or changing system mode of a dynamic storage or retrieval system.
  
[List of Patents for class 369 subclass 47.43]    47.43Having different storage and retrieval relative motion:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion control is affected during storage at a head to medium relative speed different from a head to medium relative speed during retrieval.
  
[List of Patents for class 369 subclass 47.44]    47.44Responsive to abnormal condition:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled upon a detection of an undesirable operating condition.
(1) Note. The undesirable operating condition includes, for example, out-of-focus, loss of tracking, power down, disturbance, servo unlocked conditions.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.12,for abnormal condition indicating of a dynamic radiation storage or retrieval system.
53.42,for abnormal condition indicating of a dynamic storage or retrieval system.
  
[List of Patents for class 369 subclass 47.45]    47.45By a selected relative motion error signal:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled using a designated signal representing a deviation from a desired relative motion between the transducer assembly and the record medium.
  
[List of Patents for class 369 subclass 47.46]    47.46By information signal characteristic:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled using a parameter characterizing the information signal.
(1) Note. Such parameter includes, for example, signal level or inversion interval.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.31,for condition indicating, monitoring or testing of a storage or retrieval information signal.
  
[List of Patents for class 369 subclass 47.47]    47.47By program or address signal:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled using a signal indicative of a type or a specific location of stored information.
(1) Note. The type or a specific location of stored information includes, for example, address mark, header, TOC.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.22,for control of an information signal processing channel for multiplexing or demultiplexing of an information signal having location identification information.
47.27,for control of amplitude of an information signal read out signal from a designated medium location such as preformat, header, or reference region.
47.31,for phase, timing or rate processing using a program or address signal.
47.54,for control of a transducer assembly mechanism using a program or address signal.
59.25,for format arrangement processing for an auxiliary information,such as block header or subcode information, of a binary pulse train information signal.
  
[List of Patents for class 369 subclass 47.48]    47.48By synchronous signal:
 This subclass is indented under subclass 47.38.  Subject matter wherein the relative motion is controlled using a substantially continuously repetitive clock or sync signal having constant frequency.
  
[List of Patents for class 369 subclass 47.49]    47.49Control of transducer assembly mechanism:
 This subclass is indented under subclass 47.36.  Subject matter wherein the mechanical operating condition of a transducing means or a device coupling the transducing means to a storage medium so as to record or to reproduce an information signal is controlled.

SEE OR SEARCH THIS CLASS, SUBCLASS:

24.01through 42.01, for control of a dynamic storage or retrieval apparatus by physical location of an information on a storage medium or by an operator-actuated remote control.
47.37,for controlling of a spiral track spacing.
47.38through 47.48, for controlling of a relative motion producing mechanism.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclasses 71 through 74.7for controlling the record, and subclasses 75-78.15 for controlling the head.
  
[List of Patents for class 369 subclass 47.5]    47.5Power control for energy producing device:
 This subclass is indented under subclass 47.49.  Subject matter wherein an energy level of a component of the transducing means that produces energy for reading or writing is controlled.
(1) Note. This subclass includes, for example, means for adjusting power level of a write or read beam, means for controlling duration of laser beam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.26,for indicating, monitoring or testing of an energy producing device.
116,for specific detail of information handling portion or system having light intensity adjustment or maintenance.

SEE OR SEARCH CLASS:

347Incremental Printing of Symbolic Information,   subclasses 236 and 246 for feed back of light for intensity control in a plural beam scanning apparatus and a scan of light apparatus, respectively; subclasses 237 and 247 for driving circuitry in a plural beam scanning apparatus and a scan of light apparatus, respectively.
372Coherent Light Generators,   subclasses 9 through 32for particular beam control device.
  
[List of Patents for class 369 subclass 47.51]    47.51For storage:
 This subclass is indented under subclass 47.5.  Subject matter wherein the power control is affected for writing information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.36,for signal error correcting or detecting during dynamic radiation storage.
59.24,for specific code or form generation or regeneration processing during storage.
  
[List of Patents for class 369 subclass 47.52]    47.52During multiple system modes:
 This subclass is indented under subclass 47.51.  Subject matter wherein the power control is affected during a plurality of system operations.
(1) Note. The plurality of system operations includes, for example, a) plural storage operations or b) a storage operation and one of a retrieval, erasing, or transitional operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.26,for indicating, monitoring or testing of an energy producing device.
59.11,for binary signal processing for controlling recording light characteristic.
116,for specific detail of information handling portion or system having light intensity adjustment or maintenance.

SEE OR SEARCH CLASS:

347Incremental Printing of Symbolic Information,   subclasses 236 and 246 for feed back of light for intensity control in a plural beam scanning apparatus and a scan of light apparatus, respectively; subclasses 237 and 247 for driving circuitry in a plural beam scanning apparatus and a scan of light apparatus, respectively.
372Coherent Light Generators,   subclasses 9 through 32for particular beam control device.
  
[List of Patents for class 369 subclass 47.53]    47.53Stored and retrieved testing signal:
 This subclass is indented under subclass 47.51.  Subject matter including a signal that is stored and subsequently retrieved for an evaluating purpose.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.31,for monitoring or testing of a stored and retrieved information signal in a dynamic radiation storage or retrieval system.
53.44,for monitoring or testing of a stored and retrieved information signal in a dynamic storage or retrieval system.
  
[List of Patents for class 369 subclass 47.54]    47.54By program or address signal:
 This subclass is indented under subclass 47.49.  Subject matter wherein the transducer assembly mechanism is controlled using a signal indicative of a type or a specific location of stored information.
(1) Note. The type or a specific location of stored information includes, for example, address mark, header, TOC.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.22,for control of information signal processing channel for multiplexing or demultiplexing of an information signal including location identification information.
47.27,for control of the amplitude of an information signal read out signal from a designated medium location such as preformat, header, or reference region.
47.31,for phase, timing or rate processing using a program or address signal.
47.47,for control of relative motion producing mechanism using a program or address signal.
59.25,for format arrangement processing for an auxiliary information, such as block header or subcode information, of a binary pulse train information signal.
  
[List of Patents for class 369 subclass 47.55]    47.55During initialization or start-up or changing system mode:
 This subclass is indented under subclass 47.36.  Subject matter wherein the mechanical operating condition is controlled while starting or changing system operation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.27,for optical servo positioning system affected by a start-up mode or a change of mode during system operation.
47.39,for control of a relative motion producing mechanism during initialization or start up.
53.37,for indicating, monitoring or testing of a dynamic radiation storage or retrieval system during a start-up mode or a change of mode during system operation.
53.45,for indicating, monitoring or testing of a dynamic storage or retrieval system during a start-up mode or a change of mode during system operation.
  
[List of Patents for class 369 subclass 52.1]    52.1CONTROL STRUCTURE ON STORAGE MEDIUM SENSED BY OTHER THAN TRANSDUCER SUPPORT (E.G., CONDUCTIVE STRIP, NOTCHED EDGE SENSOR):
 This subclass is indented under the class definition.  Subject matter wherein the storage medium has an element thereon which is sensed by an electrical detector distinct from a transducer support mechanism for controlling an operating condition of the storage or retrieval apparatus.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.1through 47.55, for control by a recorded or reproduced control signal.
231through 232, for mechanism control structure sensed by transducer support mechanism.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclasses 77.03 and 78.11 for nonmagnetic sensing to produce a control signal for magnetic transducer track centering and selecting, respectively.
  
[List of Patents for class 369 subclass 53.1]    53.1CONDITION INDICATING, MONITORING, OR TESTING:
 This subclass is indented under the class definition.  Subject matter including means for providing a perceptible indication of, for inspecting, or for evaluating an operating condition of a dynamic information storage or retrieval apparatus or component thereof.
(1) Note. The indication may be given continuously or upon initiation by an operator to indicate the operating condition, such as an abnormal condition.
(2) Note. Condition indicating, monitoring, or testing without the dynamic information storage or retrieval apparatus is classified elsewhere. See search notes below.

SEE OR SEARCH CLASS:

73Measuring and Testing,   subclass 152.45 for recording during drilling, subclass 153.53 for pressure measurement with a recorder, and subclass 152.62 for testing and recording a characteristic of a pump for use in a borehole or drilling apparatus.
116Signals and Indicators,   appropriate subclasses.
324Electricity: Measuring and Testing,   subclasses 210 through 212for magnetic information storage element testing, particularly subclass 212 for dynamic information element testing.
340Communications: Electrical,   subclasses 3.1 through 3.9for selective monitoring and control, subclasses 514-525 for condition responsive indicating system having means for determining the operativeness of the system, and subclass 853.9 for detail of subsurface signal storage such as memory, recorder, and register.
356Optics: Measuring and Testing,   appropriate subclasses.
360Dynamic Magnetic Information Storage or Retrieval,   subclass 31 for monitoring or testing the progress of recording.
702Data Processing: Measuring, Calibrating, or Testing,   appropriate subclasses for digital data processing systems for measuring, calibrating or testing, subclasses 108 through 126for testing, particularly subclass115 for testing of electromechanical or magnetic system.
710Electrical Computers and Digital Data Processing Systems: Input /Output,   subclasses 15 through 19for detecting or observing operating characteristics or conditions of a peripheral device.
714Error Detection/Correction and Fault Detection /Recovery,   appropriate subclasses for digital data processing systems for detecting, correcting or recovering an error or fault.
  
[List of Patents for class 369 subclass 53.11]    53.11Including radiation storage or retrieval:
 This subclass is indented under subclass 53.1.  Subject matter wherein an information signal is stored onto or retrieved from a record medium by information signal modulation of a scanning beam of radiant energy.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18,for optical reading of a mechanical record.

SEE OR SEARCH CLASS:

178Telegraphy,   subclass 15 for an automatic photographic recorder and subclass 90 for photographic code recorder.
250Radiant Energy,   subclass 271 for coded record and reader, invisible radiant energy type; and subclasses 580-591 for system having a recording detector generally responsive to an invisible radiation source.
346Recorders,   subclasses 107.1 through 107.6for light or beam recording.
347Incremental Printing of Symbolic Information,   subclasses 224 through 264for light or beam marking apparatus or processes.
352Optics: Motion Pictures,   appropriate subclasses for motion picture recording apparatus employing photosensitive recording material.
355Photocopying,   appropriate subclasses.
356Optics: Measuring and Testing,   appropriate subclasses.
359Optical: Systems and Elements,   appropriate subclasses for optical elements used in a recorder, particularly subclasses 1 through 35for holographic system or element.
378X-Ray or Gamma Ray Systems or Devices,   appropriate subclasses for X-Ray or Gamma Ray systems, particularly subclass 36 for holography or interferometry system.
399Electrophotography,   subclasses 1 through 7for electrophotography system combined with diverse subject matter.
  
[List of Patents for class 369 subclass 53.12]    53.12Having abnormal condition indicating:
 This subclass is indented under subclass 53.11.  Subject matter including means for indicating a system operation condition whereby storage or retrieval is inhibited.
(1) Note. Such operation condition includes, for example, power down, system disturbance, contamination, record carrier defect.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.32through 44.33, for optical servo positioning system including means for inhibiting recording upon detecting of a defect or abnormal condition.
53.42,for a dynamic storage or retrieval system including means for indicating abnormal condition.

SEE OR SEARCH CLASS:

353Optics: Image Projectors,   subclasses 69 through 70for distortion compensation.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 263 through 277for video error or fault detection and/or correction during recording or reproduction operations.
  
[List of Patents for class 369 subclass 53.13]    53.13Due to unwanted operational condition of record carrier:
 This subclass is indented under subclass 53.12.  Subject matter wherein the abnormal condition is due to an undesirable operational condition of the record medium.
(1) Note. The undesirable operational condition of the record medium includes, for example, defect, warp, eccentricity on the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

272through 291, for structure of a storage medium.
53.2,for indicating, monitoring or testing of an operating condition of a record medium in a dynamic information recording or reproducing apparatus.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 25 for checking record characteristics or modifying recording signal for characteristic compensation.
365Static Information Storage and Retrieval,   subclasses 200 and 201 for bad bit and testing of static storage.
711Electrical Computers and Digital Processing Systems: Memory,   subclasses 133 through 136for entry replacement strategies and page fault recovery, and subclasses 161-162 for data archiving.
714Error Detection/Correction and Fault Detection/Recovery,   subclasses 5.1 through 6.32for recovery from a fault of memory or peripheral device, subclass 42 for fault locating specific to a fault in a memory, subclass 54 for detection or notification of error of storage state, subclasses 710-711 for fault recovery of memory system, subclasses 718-723 for diagnostic testing of an information signal storage device, and subclasses 769-771 for forward error correction of encoded data stored or retrieved from a dynamic storage device.
  
[List of Patents for class 369 subclass 53.14]    53.14Eccentricity or warp:
 This subclass is indented under subclass 53.13.  Subject matter wherein the underiable operational condition of the record medium is due to an off-centered recording track or an undesired flatness recording surface.
  
[List of Patents for class 369 subclass 53.15]    53.15Defect:
 This subclass is indented under subclass 53.13.  Subject matter wherein the undesirable operational condition of the record medium is due to an unrecordable area within a recordable region.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.27,for defect compensation.
47.14,for control of a dynamic storage or retrieval system by a medium defect indicative control signal.

SEE OR SEARCH CLASS:

365Static Information Storage And Retrieval,   subclasses 200 and 201 for bad bit and testing of static storage.
  
[List of Patents for class 369 subclass 53.16]    53.16Including storage or retrieval of auxiliary signal:
 This subclass is indented under subclass 53.15.  Subject matter including means for recording or reproducing a secondary information from the record medium.
  
[List of Patents for class 369 subclass 53.17]    53.17Defect location indicating:
 This subclass is indented under subclass 53.16.  Subject matter including means for providing a perceptible indication of a location of the unrecordable area.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.14,for control of a dynamic recording or reproducing system using medium defect indicative control signal.
47.22,for control of information signal processing channel for multiplexing or demultiplexing of an information signal including location identification information.
47.31,for phase, timing or rate processing using a program or address signal.
47.47,for control of a relative motion producing mechanism using a program or address signal.
47.54,for control of a transducer assembly mechanism using a program or address signal.
53.24,for indication of an unrecorded location within a recordable region.
53.35,for signal error correction or detecting.

SEE OR SEARCH CLASS:

714Error Detection/Correction and Fault Detection /Recovery,   subclass 769 for digital error correction in a dynamic data storage.
  
[List of Patents for class 369 subclass 53.18]    53.18System disturbance:
 This subclass is indented under subclass 53.12.  Subject matter wherein the abnormal condition is a destabilization of the apparatus or the component due to power failure, vibration, shock, or impact.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.42,for indicating of a failure operating condition such as power down, system disturbance in a dynamic information storage or retrieval system.

SEE OR SEARCH CLASS:

365Static Information Storage And Retrieval,   subclasses 226 through 229for static memory powering including power conservation and data preservation.
713Electrical Computers And Digital Processing Systems: Support,   subclasses 310 through 340for computer power control, particularly subclass 340 for power source monitoring.
714Error Detection/Correction and Fault Detection /Recovery,   appropriate subclasses for power supply related reliability and availability fault recovery and fault locating.
  
[List of Patents for class 369 subclass 53.19]    53.19Relative transducer to medium misalignment (e.g., relative tilt):
 This subclass is indented under subclass 53.12.  Subject matter wherein the abnormal condition is due to a lack of proper operational axial orientation between a transducer and the record medium.
  
[List of Patents for class 369 subclass 53.2]    53.2Of record carrier:
 This subclass is indented under subclass 53.11.  Subject matter wherein the component thereof is the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

272through 291, for structure of a storage medium.
53.41,for indicating, monitoring or testing of an operating condition of a record medium in a dynamic information recording or reproducing apparatus.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage Or Retrieval,   subclass 25 for checking record characteristics or modifying recording signal for characteristic compensation.
365Static Information Storage and Retrieval,   subclass 201 for testing of a static memory for defect or erroneous information.
711Electrical Computers and Digital Processing Systems: Memory,   subclasses 133 through 136for entry replacement strategies and page fault recovery, and subclasses 161-162 for data archiving.
714Error Detection/Correction and Fault Detection/Recovery,   subclasses 5.1 through 6.32for recovery from a fault of a memory or peripheral device, subclass 42 for fault locating specific to a fault in a memory, subclass 54 for detection or notification of an error of storage state, subclasses 710-711 for fault recovery of memory system, subclasses 718-723 for diagnostic testing of an information signal storage device, and subclasses 769-771 for forward error correction of encoded data stored or retrieved from a dynamic storage device.
  
[List of Patents for class 369 subclass 53.21]    53.21For protection:
 This subclass is indented under subclass 53.2.  Subject matter including a record carrier restriction means for indicating whether a system operation on the record medium is permitted.
(1) Note. The system operation includes, for example, accessing, deleting, adding, rearranging, recording, or duplicating of signal.
(2) Note. The restriction means can be applied to a selected area of the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.32through 44.33, for optical servo positioning system including means for inhibiting recording upon detecting of a defect or abnormal condition.
47.12,for copying by control signal.
83,for editing of stored information without a control signal.
84,for copying or duplication without a control signal.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 15 for record copying, subclass 60 for recording or erasing prevention.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 252 through 260for video copy identification protection, subclass 261 for parental control, and subclass 262 for playback based on user profile in a recording and reproduction device.
  
[List of Patents for class 369 subclass 53.22]    53.22By detection of storage medium incident radiation:
 This subclass is indented under subclass 53.2.  Subject matter wherein the operating condition of the record medium is indicated, monitored, or tested by detecting radiation after the record medium is scanned by a radiant energy beam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.27,for energy producing device indicating, monitoring or testing including means for detecting storage medium incident radiation.
  
[List of Patents for class 369 subclass 53.23]    53.23Derived focusing or tracking related signal:
 This subclass is indented under subclass 53.22.  Subject matter wherein the detected radiation is converted into a signal indicative of a) a light beam focal point or a focusing error, or b) a crossing of a track by a transducing light beam or a light beam tracking error.
  
[List of Patents for class 369 subclass 53.24]    53.24Having unrecorded location indicating:
 This subclass is indented under subclass 53.2.  Subject matter including means for indicating a presence of an unrecorded area within a recorded region of the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.14,for control of a recording or reproducing system using medium defect indicative control signal.
53.17,for defect location indication.
53.35,for signal error correction or detecting.

SEE OR SEARCH CLASS:

714Error Detection/Correction and Fault Detection/Recovery,   subclass 769 for digital error correction in a dynamic data storage.
  
[List of Patents for class 369 subclass 53.25]    53.25Of transducer assembly mechanism:
 This subclass is indented under subclass 53.11.  Subject matter wherein the component thereof is a transducing means or a device coupling the transducing means to a storage medium so as to record or reproduce an information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.38,for indicating, monitoring or testing of an operating condition of an transducer assembly mechanism in a dynamic information recording or reproducing apparatus.
  
[List of Patents for class 369 subclass 53.26]    53.26Energy producing device:
 This subclass is indented under subclass 53.25.  Subject matter wherein the operating condition of a component of the transducer assembly mechanism that produces energy for reading or writing is indicated, monitored or tested.

SEE OR SEARCH THIS CLASS, SUBCLASS:

18,for optical reading of mechanical record.
47.5,for control of energy producing device of a transducer assembly mechanism.
47.52,for energy level control during multiple system modes.
116,for specific detail of information handling portion or system having light intensity adjustment or maintenance.

SEE OR SEARCH CLASS:

347Incremental Printing of Symbolic Information,   subclass 238 for specific light source, subclasses 239 and 255 for specific light modulator in a plural and singular beam scanning apparatus, respectively.
372Coherent Light Generators,   subclasses 9 through 32for particular beam control device.
  
[List of Patents for class 369 subclass 53.27]    53.27By detection of storage medium incident radiation:
 This subclass is indented under subclass 53.26.  Subject matter wherein the operating condition of the energy producing device is indicated, monitored or tested by detecting radiation after the record medium is scanned by the radiant energy beam.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.22,for record carrier indicating, monitoring or testing including means for detecting storage medium incident radiation.
  
[List of Patents for class 369 subclass 53.28]    53.28Focusing or tracking servo:
 This subclass is indented under subclass 53.25.  Subject matter wherein the operating condition of a mechanism for positioning a focal point on a desired surface position of the record medium or for causing the focal point to follow a track on record medium is indicated, monitored or tested.
  
[List of Patents for class 369 subclass 53.29]    53.29Transduced location indicating:
 This subclass is indented under subclass 53.25.  Subject matter wherein the transducer assembly mechanism is monitored to indicate transduced position as the beam incident the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.39,for indicating of a transduced position on the record medium in a dynamic information recording or reproducing apparatus.
  
[List of Patents for class 369 subclass 53.3]    53.3Of relative motion producing mechanism:
 This subclass is indented under subclass 53.11.  Subject matter wherein the component thereof is a structure which provides relative motion between a transducer and the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.43,for indicating, monitoring or testing of an operating condition of a relative motion producing mechanism in a dynamic information recording or reproducing apparatus.
  
[List of Patents for class 369 subclass 53.31]    53.31Of storage or retrieval information signal:
 This subclass is indented under subclass 53.11.  Subject matter wherein an information signal to be stored or a retrieved information signal is monitored or tested.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.15through 47.35, for control of information signal processing channel.
47.53,for a signal that is stored and subsequently retrieved for an evaluating purpose.
53.34,for monitoring or testing of a time related parameter, such as,duty cycle, jitter, sync, etc., of an information signal.
53.44,for monitoring or testing of a stored or a retrieved information signal in a dynamic storage or retrieval system.
59.1through 59.27, for dynamic storage or retrieval of a binary pulse train information signal.
124.01through 124.15, for specific information signal processing without a control signal.
174,for specific detail of information handling portion of system, including detail of signal modification.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 53 for data verification.
  
[List of Patents for class 369 subclass 53.32]    53.32Dropout indicating:
 This subclass is indented under subclass 53.31.  Subject matter including means for indicating a presence of a missing signal component of the storage or retrieval information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.18,for interpolation or dropout correcting in an information signal processing channel affected by a control signal.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclasses 270 through 271for video drop-out detection in a recording and reproduction device.
  
[List of Patents for class 369 subclass 53.33]    53.33Unwanted signal component indicating:
 This subclass is indented under subclass 53.31.  Subject matter including means for indicating a presence of an undesired signal component that does not represent information within the storage or retrieval information signal.
(1) Note. The undesired signal component that does not represent information includes, for example, distortion, noise, crosstalk, or intersymbol interference signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.17,for removal of unwanted signal component in an information processing channel affected by a control signal.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclass 269 for utilizing equalizer or filter for reducing noise in video signal, and subclasses 273-274 for correcting tape tracking crosstalk in a recording and reproduction device.
714Error Detection/Correction and Fault Detection/Recovery,   appropriate subclasses.
  
[List of Patents for class 369 subclass 53.34]    53.34Time based parameter:
 This subclass is indented under subclass 53.31.  Subject matter wherein a time related parameter of the storage or retrieval information signal is monitored or tested.
(1) Note. The time related parameter includes, for example, duty cycle, jitter, phase, sync.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.15through 47.35, for control of information signal processing channel.
53.31,for monitoring or testing of a storage or retrieval information signal in a dynamic radiation storage or retrieval system.
53.44,for monitoring or testing of a storage or retrieval information signal in a dynamic storage or retrieval system.
59.1through 59.27, for dynamic storage or retrieval of a binary pulse train information signal.
124.01through 124.15, for specific information signal processing without a control signal.
174,for specific detail of information handling portion of system including detail of signal modification.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclass 207 for synchronization or timing correction in a recording and reproduction device.
  
[List of Patents for class 369 subclass 53.35]    53.35Signal error correcting or detecting:
 This subclass is indented under subclass 53.31.  Subject matter including error correcting or detecting means for correcting an error in the storage or retrieval information signal or for identifying the presence of an error therein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.14,for control of a dynamic storage or retrieval apparatus by a medium defective indicative control signal.
53.17,for defect location indication.
53.24,for indication of an unrecorded location within a recordable region.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   subclasses 263 through 277for video error or fault detection and/or correction during recording or reproduction operation.
714Error Detection/Correction and Fault Detection/Recovery,   subclass 769 for forward correction of encoded data stored or retrieved from a dynamic storage medium.
  
[List of Patents for class 369 subclass 53.36]    53.36During storage:
 This subclass is indented under subclass 53.35.  Subject matter wherein error correcting or detecting is performed while information signal is being recorded.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.51,for control of energy producing device for storage.
59.24,for specific code or form generation or regeneration during storage.
  
[List of Patents for class 369 subclass 53.37]    53.37Initialization or start-up mode or changing system mode:
 This subclass is indented under subclass 53.11.  Subject matter wherein the operating condition associated with a starting process or a process for changing system operation is monitored or tested.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.27,for optical servo positioning system affected by a start-up mode or a change of mode during system operation.
47.39,for control of relative motion producing mechanism during initialization or start up.
47.55,for mechanism control during a start-up mode or a change of mode during system operation.
53.45,for indicating, monitoring or testing of a dynamic storage or retrieval system during a start-up mode or a change of mode during system operation.
  
[List of Patents for class 369 subclass 53.38]    53.38Of transducer assembly mechanism:
 This subclass is indented under subclass 53.1.  Subject matter wherein the component thereof is a transducing means or a device coupling the transducing means to a storage medium so as to record or reproduce an information signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.25,for indicating, monitoring or testing of an operating condition of an transducer assembly mechanism in a dynamic radiation information recording or reproducing apparatus.
  
[List of Patents for class 369 subclass 53.39]    53.39Transduced location indicating:
 This subclass is indented under subclass 53.38.  Subject matter wherein the transducer assembly mechanism is monitored to indicate a transduced position on the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

53.29,for indication of a transduced position on the record medium in a dynamic radiation information recording or reproducing apparatus.
  
[List of Patents for class 369 subclass 53.4]    53.4Positioning adjunct:
 This subclass is indented under subclass 53.38.  Subject matter including means for indexing a movable marking means of the transducing assembly machanism to set it in a proper starting position with respect to the record medium.
(1) Note. The movable marking means includes, for example, head or stylus.
  
[List of Patents for class 369 subclass 53.41]    53.41Of record carrier:
 This subclass is indented under subclass 53.1.  Subject matter wherein the component thereof is the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

272through 291, for structure of a storage medium.
53.2,for indicating, monitoring or testing of an operating condition of a record medium in a dynamic radiation information recording or reproducing apparatus.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 25 for checking record characteristics or modifying recording signal for characteristic compensation.
365Static Information Storage and Retrieval,   subclass 201 for testing of a static memory for defect or erroneous information.
711Electrical Computers and Digital Processing Systems: Memory,   subclasses 133 through 136for entry replacement strategies and page fault recovery, and subclasses 161-162 for data archiving.
714Error Detection/Correction and Fault Detection/Recovery,   subclasses 5.1 through 6.32for recovery from a fault of a memory or peripheral device, subclass 42 for fault locating specific to a fault in a memory, subclass 54 for detection or notification of an error of storage state, subclasses 710-711 for fault recovery of memory system, subclasses 718-723 for diagnostic testing of an information signal storage device, and subclasses 746-797 for forward error correction of encoded data stored or retrieved from a dynamic storage device.
  
[List of Patents for class 369 subclass 53.42]    53.42Having abnormality condition indicating:
 This subclass is indented under subclass 53.1.  Subject matter including means for indicating a system operation condition whereby storage or retrieval is inhibited.
(1) Note. Such operation condition includes, for example, power down, system disturbance, contamination, record carrier defect.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.32through 44.33, for optical servo positioning system including means to compensate for defect or abnormal condition such as inhibiting recording upon defects.
53.12,for a dynamic radiation information storage or retrieval system having means for indicating abnormal condition.
53.18,for indicating, monitoring or testing of a system disturbance in a dynamic radiation information storage or retrieval system.

SEE OR SEARCH CLASS:

353Optics: Image Projectors,   subclasses 69 through 70for distortion compensation.
360Dynamic Magnetic Information Storage or Retrieval,   subclass 25 for checking record characteristics or modifying recording signal for characteristic compensation.
365Static Information Storage and Retrieval,   subclass 201 for testing of a static memory for defect or erroneous information.
386Motion Video Signal Processing for Recording or Reproducing,   subclasses 263 through 277for video error or fault detection and/or correction during recording or reproduction operation.
711Electrical Computers and Digital Processing Systems: Memory,   subclasses 133 through 136for entry replacement strategies and page fault recovery, and subclasses 161-162 for data archiving.
714Error Detection/Correction and Fault Detection/Recovery,   subclasses 5.1 through 6.32for recovery from a fault of memory or peripheral device, subclass 42 for fault locating specific to a fault in a memory, subclass 54 for detection or notification of error of storage state, subclasses 710-711 for fault recovery of memory system, subclasses 718-723 for diagnostic testing of an information signal storage device, and subclasses 746-797 for generic data error correction.
  
[List of Patents for class 369 subclass 53.43]    53.43Of relative motion producing mechanism:
 This subclass is indented under subclass 53.1.  Subject matter wherein the component thereof is a structure which provides relative motion between a transducer and the record medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.14,for control of storage or retrieval operation by a medium defect indicative control signal.
53.3,for indicating, monitoring or testing of an operating condition of a relative motion producing mechanism in a dynamic radiation information recording or reproducing apparatus.
  
[List of Patents for class 369 subclass 53.44]    53.44Of storage or retrieval information signal:
 This subclass is indented under subclass 53.1.  Subject matter wherein an information signal to be stored or a retrieved information signal is monitored or tested.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.15through 47.35, for control of information signal processing channel.
47.53,for a signal that is stored and subsequently retrieved for an evaluating purpose.
53.31,for monitoring or testing of a stored or a retrieved information signal in a dynamic radiation storage or retrieval system.
53.34,for monitoring or testing of a time related parameter (e.g., duty cycle, jitter, sync) of an information signal.
59.1through 59.27, for dynamic storage or retrieval of a binary pulse train information signal.
124.01through 124.15, for specific information signal processing without a control signal.
174,for specific detail of information handling portion of system including detail of signal modification.

SEE OR SEARCH CLASS:

360Dynamic Magnetic Information Storage or Retrieval,   subclass 53 for data verification.
  
[List of Patents for class 369 subclass 53.45]    53.45Initialization or start-up mode or changing system mode:
 This subclass is indented under subclass 53.1.  Subject matter wherein the operating condition associated with a starting process or a process for changing system operation is monitored or tested.

SEE OR SEARCH THIS CLASS, SUBCLASS:

44.27,for optical servo positioning system affected by a start-up mode or a change of mode during system operation.
47.39,for control of relative motion producing mechanism during initialization or start up.
47.55,for mechanism control during a start-up mode or a change of mode during system operation.
53.37,for indicating, monitoring or testing of dynamic radiation storage or retrieval system during a start-up mode or a change of mode during system operation.
  
[List of Patents for class 369 subclass 59.1]    59.1BINARY PULSE TRAIN INFORMATION SIGNAL:
 This subclass is indented under the class definition.  Subject matter under subclass the including handling of an information signal composed of a series or pattern of identical pulse bits characterized solely by their presence or absence.
(1) Note. The term "identical pulse bits" refers to a signal limited to one of two predetermined values for an integer multiple of a predetermined period of time.
(2) Note. Pulse characteristic modulation is not classified herein.

SEE OR SEARCH THIS CLASS, SUBCLASS:

47.15through 47.35, for control of information signal processing channel.
53.31,for monitoring or testing of a stored or a retrieved information signal in a dynamic radiation storage or retrieval system.
53.34,for monitoring or testing of a time related parameter (e.g., duty cycle, jitter, sync) of an information signal.
53.44,for monitoring or testing of a stored or a retrieved information signal in a dynamic storage or retrieval system.
124.01through 124.15, for specific information signal processing without a control signal.
174,for specific details of information handling portion of system, including details of signal modification.

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341Coded Data Generation or Conversion,   subclasses 1 through 17for pattern reading type analog to digital converters.
  
[List of Patents for class 369 subclass 59.11]    59.11Binary signal processing for controlling recording light characteristic:
 This subclass is indented under subclass 59.1.  Subject matter including means for processing the binary signal during recording to obtain a specific characteristic for a parameter of a recording light.
(1) Note. The specific characteristic includes, for example, light bias, power, or pulse characteristic.

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47.52,for energy level control during multiple system modes.
53.26,for indicating, monitoring or testing of an energy producing device.

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347Incremental Printing of Symbolic Information,   subclasses 236 and 246 for feed back of light for intensity control in a plural beam scanning apparatus and a scan of light apparatus, respectively; subclasses 237 and 247 for driving circuitry in a plural beam scanning apparatus and a scan of light apparatus, respectively.
372Coherent Light Generators,   subclasses 9 through 32for particular beam control device.
  
[List of Patents for class 369 subclass 59.12]    59.12Pulse forming by adjusting binary signal phase or shifting binary signal pulse:
 This subclass is indented under subclass 59.11.  Subject matter wherein means for processing includes means for generating recording pulse by an adjustment of phase or a shift of pulse of the binary signal in a time domain.
  
[List of Patents for class 369 subclass 59.13]    59.13Selecting from a plurality of binary processing types:
 This subclass is indented under subclass 59.1.  Subject matter including means for selecting one among a plurality of processing operations to be performed on the binary signal.

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47.24,for sequencing or switching between processing channels.
  
[List of Patents for class 369 subclass 59.14]    59.14Changing a system mode:
 This subclass is indented under subclass 59.1.  Subject matter wherein the binary signal handling occurs in conjunction with a change of an operating mode during system operation.
(1) Note. The operating mode includes for example, lock-in, pull-in, search, normal playback, special playback, backward recording, forward recording.

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44.27,for optical servo positioning system affected by a start-up mode or a change of mode during system operation.
47.55,for mechanism control during a start-up mode or a change of mode during system operation.
53.37,for indicating, monitoring or testing of dynamic radiation storage or retrieval system during a start-up mode or a change of mode during system operation.
53.45,for indicating, monitoring or testing of a dynamic storage or retrieval system during a start-up mode or a change of mode during system operation.
  
[List of Patents for class 369 subclass 59.15]    59.15Binary signal gain processing:
 This subclass is indented under subclass 59.1.  Subject matter including means for varying an amplitude of the binary signal.

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47.25,for control of a dynamic storage or retrieval system for amplification of an information signal.
124.1through 124.13, for gain processing without a control signal.
134,for specific detail of electrical signal processing having particular amplification characteristic.

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330Amplifiers,   for amplifiers per se.
360Dynamic Magnetic Information Storage or Retrieval,   subclass 46 for a head amplifier circuit, subclass 67 and 68 for specific of an amplifier and for a recording amplifier, respectively.
386Motion Video Signal Processing for Recording or Reproducing,   subclass 304 for controlling amplitude level of a color video signal in a recording and reproduction device.
  
[List of Patents for class 369 subclass 59.16]    59.16Within a frequency band:
 This subclass is indented under subclass 59.1.  Subject matter wherein the gain processing is within a specified frequency range.

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47.26,for control of a dynamic storage or retrieval system for amplification of an information signal within a frequency band.
  
[List of Patents for class 369 subclass 59.17]    59.17Binary signal level detecting using a reference signal:
 This subclass is indented under subclass 59.1.  Subject matter including means for detecting an amplitude of the binary signal by comparison with a threshold.

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59.15through 16, for binary signal gain processing.
  
[List of Patents for class 369 subclass 59.18]    59.18Plural reference signals:
 This subclass is indented under subclass 59.17.  Subject matter wherein the amplitude is detected using more than one threshold value.
  
[List of Patents for class 369 subclass 59.19]    59.19Binary signal detecting using a clock signal:
 This subclass is indented under subclass 59.1.  Subject matter including means for detecting a presence of the binary signal using a timing signal having synchronous characteristic.
  
[List of Patents for class 369 subclass 59.2]    59.2Binary signal phase processing:
 This subclass is indented under subclass 59.1.  Subject matter including means for adjusting a phase of the binary signal.

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53.34,for monitoring or testing of a time related parameter of an information signal.
124.14,for phase processing without a control signal.

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386Motion Video Signal Processing for Recording or Reproducing,   subclass 310 for phase shifting or adjusting of a color video signal in a recording and reproduction device.
  
[List of Patents for class 369 subclass 59.21]    59.21Including sampling or A/D converting:
 This subclass is indented under subclass 59.1.  Subject matter including a) means for obtaining an instantaneous value of a read signal or b) means for performing a conversion of a read signal from an analog form into a digital form.

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47.35,for control of a dynamic storage or retrieval system for sampling, or converting of an analog or a digital information signal.
124.05,for sampling without a control signal.

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341Coded Data Generation or Conversion,   subclasses 122 through 125for sample or hold, subclasses 126-172 for analog to or from digital conversion.
  
[List of Patents for class 369 subclass 59.22]    59.22By interpolating or maximum likelihood detecting:
 This subclass is indented under subclass 59.21.  Subject matter including means for generating a missing, an additional, or a probability evaluated binary signal component and to insert such component into the binary signal.

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47.18,for control of information signal processing channel for interpolating or dropout correcting.

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386Motion Video Signal Processing for Recording or Reproducing,   subclass 271 for utilizing interpolation for compensating video drop-out in a recording and reproduction device.
  
[List of Patents for class 369 subclass 59.23]    59.23Having specific code or form generation or regeneration processing:
 This subclass is indented under subclass 59.1.  Subject matter including detail of a procedure for generating a binary coded signal having a coded relationship with an original input information or for recovering an original input information from a binary coded signal.
  
[List of Patents for class 369 subclass 59.24]    59.24During storage:
 This subclass is indented under subclass 59.23.  Subject matter the procedure is performed while information signal is being stored.

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47.51,for control of energy producing device for storage.
53.36,for signal error correcting or detecting during storage.
  
[List of Patents for class 369 subclass 59.25]    59.25Format arrangement processing for auxiliary information:
 This subclass is indented under subclass 59.1.  Subject matter including means for forming a particular distribution order of a supplemental information.
(1) Note. The supplemental information includes, for example, block headers, subcode information, directory or indexing information, control data area information.

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47.22,for control of information signal processing channel for multiplexing or demultiplexing of an information signal including location identification information.
47.27,for control of an amplitude of a read out information signal from a designated medium location such as preformat, header, or reference region.
47.31,for phase, timing or rate processing using a program or address signal.
47.47,for control of relative motion producing mechanism using a program or address signal.
47.54,for control of a transducer assembly mechanism using program or address signal.
  
[List of Patents for class 369 subclass 59.26]    59.26Binary signal processing of sectioned information:
 This subclass is indented under subclass 59.1.  Subject matter including means for subdividing the binary signal into portions of similar repetitive characteristic for storage, or for eliminating subdivisions of the binary signal during retrieval.
(1) Notes. The sectioned information includes, for example, sectors, lengths, frames, or blocks.
  
[List of Patents for class 369 subclass 59.27]    59.27Binary signal multiplexing or demultiplexing:
 This subclass is indented under subclass 59.1.  Subject matter including means for a) combining plural input signals into a binary recording signal such that at any instance of time one signal is outputted for storage or b) separating a retrieved multiplexed binary signal into plural output signals for reproducing.

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47.2through 47.22, for control of a dynamic storage or retrieval system for multiplexing or demultiplexing.
124.09,for multiplexing or demultiplexing without a control signal.

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370Multiplex Communications,   subclasses 431 through 463for channel assignment techniques.
  
[List of Patents for class 369 subclass 60.01]    60.01SIGNAL PROCESSING BY STORAGE AND SUBSEQUENT RETRIEVAL (E.G., FREQUENCY SHIFT, DELAY, ETC.):
 This subclass is indented under the class definition.  Subject matter wherein a time-dependent characteristic of a signal is modified by storing the signal on a storage medium and subsequently reproducing the signal from the storage medium.
(1) Note. The term "characteristic" includes the time of occurrence of the signal.
(2) Note. The term "storage medium" is synonymous with a "record carrier" under the class definition and does not refer to a static memory.
  
[List of Patents for class 369 subclass 61]    61STORAGE OF DIRECTLY RETRIEVABLE MODULATED R.F. OR SUPERAUDIBLE CARRIER SIGNAL:
 This subclass is indented under the class definition.  Subject matter wherein the information is stored in the form of a wave modulated by the information signal, which upon retrieval forms the stored modulated signal.
  
[List of Patents for class 369 subclass 62]    62STORAGE OF SIGNAL MODULATING COMPONENT:
 This subclass is indented under the class definition.  Subject matter wherein the information signal to be stored is presented in the form of a carrier wave modulated by a lower frequency component, and the higher frequency wave is partially or completely suppressed prior to storage and is reinserted subsequent to retrieval.
(1) Note. The term "suppressed" refers to removal of the carrier wave as by demodulation.
  
[List of Patents for class 369 subclass 63]    63SOUND REPRODUCTION FOR TOY OR NOVELTY DEVICE (E.G., TALKING DOLL):
 This subclass is indented under the class definition.  Subject matter specifically designed for sound reproduction and mounting within a device otherwise used for novelty or amusement.
(1) Note. Such devices are often of the direct mechanical conversion to sound type reproducers.
(2) Note. If the sole disclosure is of a sound reproducer in a toy or novelty device, classification is in this subclass even in the absence of claimed limitations thereto.
(3) Note. Note classification is in Class 446, Amusement Devices: Toys, for sounding toys with structural details of the toy.
  
[List of Patents for class 369 subclass 64]    64With electrical information signal processing:
 This subclass is indented under subclass 63.  Subject matter having electrical circuitry for handling the intelligence signal.
(1) Note. Subclasses 63 and 65-68 are intended to include, at most, nominal recitation of an electrical information signal.
  
[List of Patents for class 369 subclass 65]    65Indexing to track (e.g., consecutive):
 This subclass is indented under subclass 63.  Subject matter having selection of one of a plurality of storage medium tracks by successive operations of the sound reproducer.

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30.02,for similar subject matter having operator-controlled designation of a track.
98,for similar subject matter of general utility.
  
[List of Patents for class 369 subclass 66]    66By chance:
 This subclass is indented under subclass 65.  Subject matter wherein the selection of one of plural sound tracks is made without any control of which track is chosen.
(1) Note. The term "random indexing" is sometimes used for these devices, and should be distinguished from random access or selective addressing.
(2) Note. The plural tracks may be on a single or on distinct storage elements.

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98,for indexing by chance to plural tracks on a single surface.
178.01,for indexing by chance to plural storage elements.
  
[List of Patents for class 369 subclass 67]    67With beginning or end of cycle stylus return:
 This subclass is indented under subclass 63.  Subject matter including a mechanical pickup which is returned to an initial position prior to beginning or subsequent to completion of the reproduction.

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225+,for pickup restoring not limited to toys or novelty devices.
  
[List of Patents for class 369 subclass 68]    68Manual motion application (e.g., novelty card, hand-held stylus):
 This subclass is indented under subclass 63.  Subject matter wherein relative motion between the storage medium element and transducer assembly is provided by a force concurrently applied by an operator’s hand.

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177,for a mechanism subsystem having a stationary storage medium, in general.
  
[List of Patents for class 369 subclass 69]    69SYSTEMS OR SUBSYSTEMS COMBINED WITH DIVERSE ART DEVICE:
 This subclass is indented under the class definition.  Subject matter including structure peculiar to this class for either information signal processing or storage medium element handling, and having specified cooperation with structure otherwise classifiable elsewhere and not provided for therein.

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1+,for such subject matter combined with a distinct audio signal source.
  
[List of Patents for class 369 subclass 70]    70For control of diverse art device:
 This subclass is indented under subclass 69.  Subject matter including controlling the operation of the diverse art device by the storage or retrieval operation.
  
[List of Patents for class 369 subclass 71]    71WITH STYLUS CLEANING OR TREATMENT (E.G., GRINDING):
 This subclass is indented under the class definition.  Subject matter having removal of debris from, or modification of, a stylus.
  
[List of Patents for class 369 subclass 72]    72WITH STORAGE MEDIUM CLEANING OR ELECTROSTATIC CHARGE NEUTRALIZATION:
 This subclass is indented under the class definition.  Subject matter having structure or method for removing undesired material or electrostatic charge from the storage medium combined with storage or retrieval.

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15Brushing, Scrubbing, and General Cleaning,   appropriate subclasses for mechanical cleaning of storage medium not combined with storage or retrieval.
361Electricity: Electrical Systems and Devices,   subclasses 212+ for discharging of an electrostatic charge, in general.
  
[List of Patents for class 369 subclass 73]    73By charge leakage (e.g., ionized particles):
 This subclass is indented under subclass 72.  Subject matter wherein the cleaning or charge neutralization has structure to conduct undesired charge away from the storage medium.
(1) Note. The structure may include a source of air ionizing radiation.
  
[List of Patents for class 369 subclass 74]    74By tone arm attachment:
 This subclass is indented under subclass 72.  Subject matter wherein the cleaning structure is mounted on the transducer assembly support.
  
[List of Patents for class 369 subclass 75.11]    75.11WITH PARTICULAR CABINET STRUCTURE:
 This subclass is indented under the class definition.  Subject matter including structural details of an enclosure surrounding the components of the dynamic information storage or retrieval system.
(1) Note. The cabinet structures in this and the indented subclasses must include some specific structure of a dynamic information storage or retrieval system or an element thereof, otherwise such structures classified as a cabinet, per se.

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12,for cabinet structure for a radiophonograph combination.

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174Electricity: Conductors and Insulators,   subclasses 50 through 65G for boxes and housings limited by claimed structure to electrical use but having no characteristic limiting them to particular electrical equipment; and subclasses 250-268 for printed circuit arrangements of general utility.
181Acoustics,   subclasses 148 through 156for a diaphragm mounted in a cabinet.
312Supports: Cabinet Structure,   subclasses 9.1 -9.64 for cabinets or enclosures especially designed to house phonograph instruments or records.
361Electricity: Electrical Systems and Devices,   subclasses 600 through 837for boxes and mountings in combination with electrical apparatus having no significant art limitation, or boxes and mounting in combination with plural diverse electrical apparatus.
720Dynamic Optical Information Storage or Retrieval,   subclasses 600 through 657for a particular cabinet structure in a dynamic optical information storage or retrieval device.
  
[List of Patents for class 369 subclass 75.21]    75.21With mechanism to place disc on a turntable:
 This subclass is indented under subclass 75.11.  Subject matter including a mechanical arrangement normally inside the cabinet which moves to the cabinet exterior to position the record medium element onto a turntable within the cabinet.

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720Dynamic Optical Information Storage or Retrieval,   subclasses 601 through 616for tray loading or ejecting in a dynamic optical information storage or retrieval device.
  
[List of Patents for class 369 subclass 76]    76With electrical information signal processing:
 This subclass is indented under subclasses 75.11.  Subject matter including electrical handling of the information signal.
(1) Note. Subclasses 75.11 and 77.11 include at most nominal recitation of an electrical signal.

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128+,for electrical information signal processing with mechanical storage or retrieval, absent particular cabinet structure.
  
[List of Patents for class 369 subclass 77.11]    77.11Slotted for edgewise insertion of storage disc:
 This subclass is indented under subclass 75.11.  Subject matter where there is a long narrow opening in the cabinet structure which is used to insert or remove a disc shaped storage medium.

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720Dynamic Optical Information Storage or Retrieval,   subclasses 617 through 644for insertion of optical storage medium in a dynamic optical information storage or retrieval device.
  
[List of Patents for class 369 subclass 77.21]    77.21Having disc stored in protective jacket:
 This subclass is indented under subclass 77.11.  Subject matter wherein the disc is surrounded by a protective enclosure when in other than the location at which the information storage or retrieval is performed.
(1) Note. The protective jacket is often removed from the cabinet with the disc remaining therein.

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360Dynamic Magnetic Information Storage or Retrieval,   subclasses 99.02-99.03 for a floppy disk loading or ejecting mechanism in a magnetic recorder or reproducer.
  
[List of Patents for class 369 subclass 78]    78With lid-mounted transducer assembly carrier:
 This subclass is indented under subclass 75.11.  Subject matter wherein the enclosure has a lid with structure to carry the transducer assembly of the enclosed storage or retrieval equipment.
  
[List of Patents for class 369 subclass 79]    79With closure-operated interlock or braking actuator:
 This subclass is indented under subclass 75.11.  Subject matter wherein the enclosure has a lid or door with structure to prevent or stop the operation of the enclosed equipment when the cabinet lid or door is in other than a closed position.
  
[List of Patents for class 369 subclass 80]    80Particular acoustical structure (e.g., baffle):
 This subclass is indented under subclass 75.11.  Subject matter including structure which mechanically modifies sound waves.
(1) Note. This is primarily a collection of old style mechanical phonographs with sound amplifying or modifying structure (e.g., trumpets, baffles, etc.).
  
[List of Patents for class 369 subclass 81]    81Having collapsible or expandable acoustic path:
 This subclass is indented under subclass 80.  Subject matter in which a portion of the acoustic structure defining the acoustic path is movable so as to vary a dimension of the acoustic path.
(1) Note. Typical structure include lid controlled folding horn, and telescoping horn sections for making compact.

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181Acoustics,   subclasses 178 , 186, and 197 for similar subject matter of general utility.
  
[List of Patents for class 369 subclass 82]    82Having parallel acoustic paths:
 This subclass is indented under subclass 80.  Subject matter including structure having a plurality of acoustical energy conducting passages through which such energy may travel simultaneously.
(1) Note. A baffle in a horn may define several such paths.
(2) Note. The combinations including shutters are classified in this subclass.

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181Acoustics,   subclasses 184 and 185 for similar subject matter of general utility.
  
[List of Patents for class 369 subclass 83]    83EDITING OF STORED INFORMATION:
 This subclass is indented under the class definition.  Subject matter for deleting, adding, or rearranging portions of a stored information signal on a storage medium element.
(1) Note. The change to the information signal may be effected either by physical rearrangement of portions of the storage medium element (e.g., cutting and splicing), or by rerecording the information signal onto the same or another storage medium element.

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84+,for rerecording of a signal without modification.

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360Dynamic Magnetic Information Storage or Retrieval,   subclasses 13+ for similar subject matter limited to magnetic storage and retrieval.
  
[List of Patents for class 369 subclass 84]    84DUPLICATION OR COPYING (E.G., RERECORDING):
 This subclass is indented under the class definition.  Subject matter wherein information is retrieved from one storage medium and subsequently stored on another distinct storage medium.
(1) Note. It is necessary that the retrieval and storage be effected by a dynamic transformation.

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264Plastic and Nonmetallic Article Shaping or Treating: Processes,   subclasses 106+ for the method of stamping duplicate records.
360Dynamic Magnetic Information Storage or Retrieval,   subclasses 15+ for copying a magnetic record.
425Plastic Article or Earthenware Shaping or Treating: Apparatus,   appropriate subclasses for apparatus for stamping duplicate record.
  
[List of Patents for class 369 subclass 85]    85To diverse type of storage medium:
 This subclass is indented under subclass 84.  Subject matter wherein the storage medium element onto which the information is stored has a different configuration than the storage medium from which the information is retrieved.
(1) Note. Included herein are devices for recording phonograph records from magnetic tape.

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17,for converting the varied characteristic on the same storage medium element.
  
[List of Patents for class 369 subclass 86]    86STORAGE OR RETRIEVAL OF SPATIALLY RELATED ACOUSTIC SIGNALS (E.G., STEREO):
 This subclass is indented under the class definition.  Subject matter in which the signal to be stored is responsive to, or the retrieved signal produces, plural audible vibrations which have a common time base and a spatial relationship to produce the effect of position or depth.
(1) Note. The plural signals are usually stored and received separately and concurrently.
(2) Note. The signals are often combined (e.g., as sum or difference signals) before storage and separated after retrieval.

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5,for a radio combined with a storage or retrieval device in which either may be stereophonic.

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381Electrical Audio Signal Processing Systems and Devices,   subclass 2 .
  
[List of Patents for class 369 subclass 87]    87Simulated spatial effect (e.g., pseudo-stereo):
 This subclass is indented under subclass 86.  Subject matter in which a single reproduced signal is processed to give a stereo effect.

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381Electrical Audio Signal Processing Systems and Devices,   subclasses 17+ for Pseudo Stereo Systems in general.
  
[List of Patents for class 369 subclass 88]    88With transformation or intentional distortion of information signal (e.g., preemphasis):
 This subclass is indented under subclass 86.  Subject matter having signal processing prior to storage which includes an intentional change to the information signal.
(1) Note. Such changes are often frequency dependent signal magnitude control to compensate apparatus characteristic differences between the storage and the retrieval device.

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133,for similar subject matter for electro-mechanical recording, not restricted to plural audio signals.
174+,for signal modification not restricted to plural audio signals, nor any particular type of storage or retrieval.
  
[List of Patents for class 369 subclass 89]    89Quadraphonic:
 This subclass is indented under subclass 86.  Subject matter in which four or more channels are stored or retrieved.
  
[List of Patents for class 369 subclass 90]    90Including modulated subchannel signal:
 This subclass is indented under subclass 89.  Subject matter wherein at least one channel or combined signal modulates an A.C. wave prior to storage, or demodulation of such wave after retrieval.
(1) Note. Frequently, both a direct wave and a modulated wave are stored upon the same track to permit storage of four channels on two tracks.
  
[List of Patents for class 369 subclass 91]    91Having distinct electrical channels:
 This subclass is indented under subclass 86.  Subject matter having a separate electrical circuit for each channel, each of said circuits having no common electrical elements other than for power supply.
  
[List of Patents for class 369 subclass 92]    92Including distinct storage tracks on record medium:
 This subclass is indented under subclass 86.  Subject matter wherein the paths of the transducer over the record medium for each channel are physically separated.
  
[List of Patents for class 369 subclass 93]    93SYSTEMS HAVING PLURAL PHYSICALLY DISTINCT INDEPENDENT TRACKS ON A SINGLE STORAGE MEDIUM SURFACE:
 This subclass is indented under the class definition.  Subject matter having a storage medium element with plural spaced apart information modulated tracks.
(1) Note. Adjacent sections of a single continuous spiral track are not plural tracks; however, distinct interleaved spirals are plural tracks for purposes of this subclass.
  
[List of Patents for class 369 subclass 94]    94Having layered storage medium:
 This subclass is indented under subclass 93.  Subject matter wherein the storage medium element has plural coextensive surfaces, a plurality of which have storage tracks thereon, and which tracks are each accessible for storage or retrieval from the same side of the storage element.
  
[List of Patents for class 369 subclass 95]    95Common time base (i.e., simultaneous):
 This subclass is indented under subclass 93.  Subject matter wherein the plural tracks are either stored or intended to be retrieved concurrently.

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14,for simultaneous storage or retrieval of diverse types.
47+,for similar subject matter in which one track stores a control signal.
92,for plural tracks producing binaural effects.
  
[List of Patents for class 369 subclass 96]    96Continuous consecutive storage or retrieval of interrupted track for single signal (e.g., automatic reversal):
 This subclass is indented under subclass 93.  Subject matter wherein the plural tracks are consecutively utilized for storage or retrieval of a continuing signal.
(1) Note. The tracks may be connected at distinct points.
(2) Note. The term "continuing signal" indicates time continuity of the signal being stored or retrieved.

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41.01,for selective addressing of one of a plurality of signals on a record medium.
98,for consecutive indexing of signal tracks not limited to use for a time-continuous signal.
  
[List of Patents for class 369 subclass 97]    97Tracks transverse to a motion component:
 This subclass is indented under subclass 96.  Subject matter wherein the tracks have a component of motion transverse to the microscopic movement of the storage medium element.
(1) Note. The transducer assembly is often movable to obtain a higher velocity of relative motion than that of the storage medium.
  
[List of Patents for class 369 subclass 98]    98Indexing to discrete signal tracks (e.g., consecutive, by chance):
 This subclass is indented under subclass 93.  Subject matter wherein selection of the information modulated track is made by starting a storage or retrieval operation.

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41.01,for such subject matter with designation of track.
65+,for similar subject matter utilized in a toy or novelty device.
  
[List of Patents for class 369 subclass 99]    99SPECIFIC DETAIL OF INFORMATION HANDLING PORTION OF SYSTEM:
 This subclass is indented under the class definition.  Subject matter having at least one step or element of information signal processing particularly described.
(1) Note. Nominal recitation of a signal processing step or element to show relationship to mechanical structure will be classified with such mechanical structure.
(2) Note. Information processing methods, structure, and circuitry, not limited to information storage and retrieval, are each classified in the appropriate class therefor.
  
[List of Patents for class 369 subclass 100]    100Radiation beam modification of or by storage medium:
 This subclass is indented under subclass 99.  Subject matter wherein the information signal is stored on or retrieved from the storage medium by a beam of radiant energy which is modulated by the information signal either (a) to store the information on a radiant energy sensitive storage medium, or (b) by a radiant energy controlling storage medium for subsequent retrieval by sensing of the radiant energy.
  
[List of Patents for class 369 subclass 101]    101Invisible radiation (e.g., electron beam or X-ray):
 This subclass is indented under subclass 100.  Subject matter wherein the radiant energy is either (a) radiation outside the visible spectrum (4000-7000A5), or (b) a subatomic particle (e.g., electron) beam.
(1) Note. A charged particle (e.g., electron) beam may be considered either invisible radiation or a particular electrical current depending upon the manner in which such a beam interacts with the storage medium.

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126,for storage or retrieval by an electron beam modifying or being controlled by storage medium element charge.

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250Radiant Energy,   appropriate subclasses for invisible radiant energy devices or systems, in general.
  
[List of Patents for class 369 subclass 102]    102Multiplex:
 This subclass is indented under subclass 100.  Subject matter wherein a single radiation beam simultaneously stores or retrieves a plurality of independent signals on a single track of the storage medium element.
(1) Note. Each signal may modulate different ranges of value of a property (e.g., frequency, polarization) of the radiation beam; or each signal may modulate the radiation beam in distinct discrete time intervals.

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398Optical Communications,   subclasses 43 through 103for a multiplex arrangement for optical communications.
  
[List of Patents for class 369 subclass 103]    103Holographic:
 This subclass is indented under subclass 100.  Subject matter wherein the storage medium is a three-dimensional coherent image.

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359Optical: Systems and Elements,   subclasses 1+ for holographic systems and elements, in general.
365Static Information Storage and Retrieval,   subclasses 125 , 216, and 235 for holographic static storage or retrieval of information.
  
[List of Patents for class 369 subclass 104]    104Ribbon light modulator:
 This subclass is indented under subclass 100.  Subject matter including a flat flexible electrical conductor variably blocking the optical path in accordance with an information current flowing therethrough.
  
[List of Patents for class 369 subclass 105]    105Penumbra or push-pull optical system:
 This subclass is indented under subclass 100.  Subject matter wherein the optical path has either (a) variably superimposed shadows, or (b) complementarily varying beams.
  
[List of Patents for class 369 subclass 106]    106Optical feedback:
 This subclass is indented under subclass 100.  Subject matter having intelligence signal processing circuitry which includes a radiation beam link from a later point in such circuitry to a preceding point in such circuitry.
  
[List of Patents for class 369 subclass 107]    107Ground noise suppression, signal envelope, or plural optical modulation:
 This subclass is indented under subclass 100.  Subject matter wherein provision is made to suppress spurious signals caused by graininess of the film and emulsion; or the storage medium has an additional signal representative of the average signal level, or has a plurality of characteristics varied.
  
[List of Patents for class 369 subclass 108]    108Color:
 This subclass is indented under subclass 100.  Subject matter in which the radiant energy beam modifies, or is modified by the storage medium in a selectively variable frequency dependent manner within the visible spectrum (i.e., 4000-7000Ao).
  
[List of Patents for class 369 subclass 109.01]    109.01Diffractive storage medium information element:
 This subclass is indented under subclass 100.  Subject matter wherein the radiant energy beam is deflected by the edge of an object on the storage medium by other than reflection or refraction, which object being indicative of the information signal, or the radiant energy beam causes the modification of the storage medium to store the information signal as an object whose edge is capable of deflecting a radiant energy beam by other than reflection or refraction.
(1) Note. Diffraction grating elements that are not storage medium objects are not classified herein.

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112.03through 112.15, for diffraction grating elements that are not storage medium objects and that are in the information handling portion of the dynamic information storage or retrieval system.

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359Optical: Systems and Elements,   subclasses 558 through 576for diffraction gratings, per se.
  
[List of Patents for class 369 subclass 109.02]    109.02Plural elements with distinct diffractive characteristics:
 This subclass is indented under subclass 109.01.  Subject matter wherein the radiant energy beam is diffracted by a multiplicity of elements each having a different diffractive attribute, or the radiant energy beam causes the modification of the storage medium to store plurality of elements each having a different diffractive attribute.
  
[List of Patents for class 369 subclass 110.01]    110.01Polarization of or by storage medium information element:
 This subclass is indented under subclass 100.  Subject matter wherein the direction of the electric field component of the radiant energy beam is restricted by an object indicative of the information signal on the storage medium, or the radiant energy beam causes polarization of the object to store the information signal.
(1) Note. Polarized optical elements, e.g., polarized beam splitters and polarized lenses, that are not storage medium objects are not classified herein.

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112.16through 112.21, for polarized or polarizing optical elements that are not storage medium objects and that are in the information handling portion of the dynamic information storage or retrieval system.

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359Optical: Systems and Elements,   subclasses 483.01 through 494.01for polarized or polarizing optical elements, per se.
  
[List of Patents for class 369 subclass 110.02]    110.02Separation into plural polarization component beams:
 This subclass is indented under subclass 110.01.  Subject matter wherein the radiant energy beam is divided into a multiplicity of radiant energy beams, each having a restricted electric field component.
(1) Note. For example, dividing using a beam splitter is classified herein.
  
[List of Patents for class 369 subclass 110.03]    110.03By diffraction:
 This subclass is indented under subclass 110.02.  Subject matter wherein the separation is performed by deflection other than reflection or refraction of the radiant energy beam by the edge of a portion of an object into the plurality of radiant energy beams.

SEE OR SEARCH THIS CLASS, SUBCLASS:

112.03through 112.15, for diffractive optical elements in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 110.04]    110.04Using plural polarized or polarizing optical elements:
 This subclass is indented under subclass 110.02.  Subject matter wherein the separation is performed using two or more objects, each of which either utilize the direction of the electric field component of the radiant energy beam to perform the separation, or modify the direction of the electric field component of the radiant energy beam.

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112.17,for plural polarized or polarizing optical elements in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 111]    111Spiral or helical track:
 This subclass is indented under subclass 100.  Subject matter wherein the path along which the information is stored or retrieved has plural, curved turns about an axis of rotation of the storage medium.
  
[List of Patents for class 369 subclass 112.01]    112.01Having particular optical element or particular placement thereof in radiation beam path to or from storage medium:
 This subclass is indented under subclass 100.  Subject matter including an element of specified characteristic or location within a space traversed by the radiant energy beam for modifying the radiant energy beam.
(1) Note. For example, modification by reflecting, diffracting, focusing, de-focusing, refracting, or redirecting the radiation beam is classified herein.
(2) Note. Elements for blocking or stopping the beam or elements having a slit or an aperture which do no more than block a portion of the beam are not classified herein.

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118,for elements for blocking or stopping the beam or having a slit or an aperture which block a portion of the beam.
  
[List of Patents for class 369 subclass 112.02]    112.02Crystal (e.g., liquid, elasto-optic, photo-refractive, etc.):
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element includes an object in which atoms or molecules are arranged in a regular three-dimensional lattice array.
(1) Note. The order of the array provides radiant energy modifying properties; for example, anisotropic scattering is the property of a crystal that exhibits different magnetic, electrical, optical, and other physical properties when measured along axes in different directions.

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359Optical: Systems and Elements,   subclasses 237 through 324for optical modulator optics, e.g., crystal optical elements, per se.
  
[List of Patents for class 369 subclass 112.03]    112.03Diffractive:
 This subclass is indented under subclass 112.01.  Subject matter wherein upon striking the edge of an optical element, the radiant energy direction is deflected by other than reflection or refraction.
(1) Note. Diffractive objects indicative of an information signal on the storage medium are not classified herein.

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109.01through 109.02, for diffractive objects indicative of an information signal on the storage medium.

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359Optical: Systems and Elements,   subclasses 558 through 576,for diffractive optical elements, per se.
  
[List of Patents for class 369 subclass 112.04]    112.04Plural distinct diffractive optical elements:
 This subclass is indented under subclass 112.03.  Subject matter including a multiplicity of separate diffractive optical elements.
  
[List of Patents for class 369 subclass 112.05]    112.05In radiation beam path to storage medium:
 This subclass is indented under subclass 112.03.  Subject matter wherein the diffractive optical element is located to provide diffraction in the radiant energy beam path to the storage medium.
  
[List of Patents for class 369 subclass 112.06]    112.06Sectioned optical element:
 This subclass is indented under subclass 112.05.  Subject matter wherein the diffractive optical element is divided into a multiplicity of portions, at least one portion of which is diffractive.
  
[List of Patents for class 369 subclass 112.07]    112.07Plural diffractive sections:
 This subclass is indented under subclass 112.06.  Subject matter wherein the sectioned diffractive optical element includes two or more diffractive portions.
  
[List of Patents for class 369 subclass 112.08]    112.08Lens section:
 This subclass is indented under subclass 112.06.  Subject matter wherein the sectioned diffractive optical element includes a portion of transparent material with opposite surfaces, at least one of which is curved, whereby the radiant energy beam is refracted to converge or diverge.

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112.23through 112.26, for optical lens elements not having a diffractive portion in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 112.09]    112.09Prism, mirror, or waveguide section:
 This subclass is indented under subclass 112.06.  Subject matter wherein the sectioned diffractive optical element includes a portion having a transparent means for refracting the radiant energy beam passed therethrough, a means for reflecting the radiant energy beam, or a system of material boundaries in the form of a solid dielectric rod or dielectric-filled tubular conductor for guiding high-frequency electromagnetic waves, i.e., a radiant energy beam.

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112.27through 112.29, for optical prism, mirror, or waveguide elements not having a diffractive portion in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 112.1]    112.1Holographic:
 This subclass is indented under subclass 112.05.  Subject matter wherein the diffractive optical element is a three- dimensional coherent image.
(1) Note. Holographic storage of an information signal on the storage medium is not classified herein.

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103,for holographic storage of an information signal on the storage medium.

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359Optical: Systems and Elements,   subclasses 1 through 35for holographic optical elements, per se.
  
[List of Patents for class 369 subclass 112.11]    112.11Sectioned optical element:
 This subclass is indented under subclass 112.03.  Subject matter wherein the diffractive optical element is divided into a multiplicity of portions, at least one portion of which is diffractive.
  
[List of Patents for class 369 subclass 112.12]    112.12Plural diffractive sections:
 This subclass is indented under subclass 112.11.  Subject matter wherein the sectioned diffractive optical element includes two or more diffractive portions.
  
[List of Patents for class 369 subclass 112.13]    112.13Lens section:
 This subclass is indented under subclass 112.11.  Subject matter wherein the sectioned diffractive optical element includes a portion of transparent material with opposite surfaces, at least one of which is curved, whereby the radiant energy beam is refracted to converge or diverge.

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112.23through 112.26, for optical lens elements not having a diffractive portion in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 112.14]    112.14Prism, mirror, or waveguide section:
 This subclass is indented under subclass 112.11.  Subject matter wherein the sectioned diffractive optical element includes a portion having a transparent means for refracting the radiant energy beam passed therethrough, a means for reflecting the radiant energy beam, or a system of material boundaries in the form of a solid dielectric rod or dielectric-filled tubular conductor for guiding high-frequency electromagnetic waves, i.e., a radiant energy beam.

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112.27through 112.29, for optical prism, mirror, or waveguide elements not having a diffractive portion in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 112.15]    112.15Holographic:
 This subclass is indented under subclass 112.03.  Subject matter wherein the diffractive optical element is a three- dimensional coherent image.
(1) Note. Holographic storage of an information signal on the storage medium is not classified herein.

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103,for holographic storage of an information signal on the storage medium.

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359Optical: Systems and Elements,   subclasses 1 through 35for holographic optical elements, per se.
  
[List of Patents for class 369 subclass 112.16]    112.16Polarized or polarizing:
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element utilizes the direction of the electric field component of the radiant energy beam for selectively redirecting the beam, or the optical element modifies the direction of the electric field component of the radiant energy beam.

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359Optical: Systems and Elements,   subclasses 483.01 through 494.01for polarized or polarizing optical elements, per se.
  
[List of Patents for class 369 subclass 112.17]    112.17Plural distinct polarized or polarizing optical elements:
 This subclass is indented under subclass 112.16.  Subject matter wherein there is a multiplicity of separate polarized or polarizing optical elements.
  
[List of Patents for class 369 subclass 112.18]    112.18Sectioned optical element:
 This subclass is indented under subclass 112.16.  Subject matter wherein the polarized or polarizing optical element is divided into a multiplicity of portions, at least one portion of which has polarized or polarizing property.
  
[List of Patents for class 369 subclass 112.19]    112.19Plural polarized or polarizing sections:
 This subclass is indented under subclass 112.18.  Subject matter wherein the sectioned polarized or polarizing optical element includes two or more polarized or polarizing portions.
  
[List of Patents for class 369 subclass 112.2]    112.2Lens section:
 This subclass is indented under subclass 112.18.  Subject matter wherein the sectioned polarized or polarizing optical element includes a portion of transparent material with opposite surfaces, at least one of which is curved, whereby the radiant energy beam is refracted to converge or diverge.

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112.23through 112.26, for optical lens elements not having a polarized or polarizing portion in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 112.21]    112.21Prism, mirror, or waveguide section:
 This subclass is indented under subclass 112.18.  Subject matter wherein the sectioned polarized or polarizing optical element includes a portion having a transparent means for refracting the radiant energy beam passed therethrough, a means for reflecting the radiant energy beam, or a system of material boundaries in the form of a solid dielectric rod or dielectric-filled tubular conductor for guiding high-frequency electromagnetic waves, i.e., a radiant energy beam.

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112.27through 112.29, for optical prism, mirror, or waveguide elements not having a polarized or polarizing portion in the information handling portion of the dynamic information storage or retrieval system.
  
[List of Patents for class 369 subclass 112.22]    112.22Particular optical filter:
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element includes an optical device used to reject radiation at a certain frequency while passing radiation at another frequency of the radiant energy beam.

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359Optical: Systems and Elements,   subclasses 577 through 590and subclasses 885-892 for light interference optics and absorption filters, e.g. optical filtering elements, per se.
  
[List of Patents for class 369 subclass 112.23]    112.23Particular lens:
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element includes a transparent material with opposite surfaces, at least one of which is curved, whereby the radiant energy beam is refracted to converge or diverge in a specified manner.

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359Optical: Systems and Elements,   subclasses 362 through 435and subclasses 642-830 for optical lens elements, per se.
  
[List of Patents for class 369 subclass 112.24]    112.24Plural distinct lenses:
 This subclass is indented under subclass 112.23.  Subject matter wherein there is a multiplicity of separate lens elements.
  
[List of Patents for class 369 subclass 112.25]    112.25Sectioned element:
 This subclass is indented under subclass 112.23.  Subject matter wherein the optical element is divided into a multiplicity of portions, at least one of which is a lens portion.
  
[List of Patents for class 369 subclass 112.26]    112.26Plural lens sections:
 This subclass is indented under subclass 112.25.  Subject matter wherein the sectioned lens element includes two or more lens portions.
  
[List of Patents for class 369 subclass 112.27]    112.27Waveguide:
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element includes a system of material boundaries in the form of a solid dielectric rod or dielectric-filled tubular conductor for guiding high-frequency electromagnetic waves, i.e., a radiant energy beam.

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385Optical Waveguides,   subclasses 1 through 147for optical waveguide elements, per se.
  
[List of Patents for class 369 subclass 112.28]    112.28Prism:
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element includes a transparent means for refracting the radiant energy beam passed therethrough.

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359Optical: Systems and Elements,   subclasses 831 through 837for optical prism elements, per se.
  
[List of Patents for class 369 subclass 112.29]    112.29Mirror:
 This subclass is indented under subclass 112.01.  Subject matter wherein the optical element includes means for reflecting the radiant energy beam.

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359Optical: Systems and Elements,   subclasses 838 through 884for optical mirror elements, per se.
  
[List of Patents for class 369 subclass 113]    113With medium contacting drum or gate in optical system (e.g., sound head):
 This subclass is indented under subclass 100.  Subject matter including an element in or adjacent to the beam path which positions the storage medium and has either a linear or cylindrical contacting surface.
  
[List of Patents for class 369 subclass 114]    114Movable roller support for optical path:
 This subclass is indented under subclass 113.  Subject matter in which the element for positioning the storage medium is a rotatably mounted drum or roller.
  
[List of Patents for class 369 subclass 115]    115With driving or stabilizing mechanism:
 This subclass is indented under subclass 113.  Subject matter further including driving, movable, or other elements for controlling or smoothing the motion of the storage medium.
  
[List of Patents for class 369 subclass 116]    116Light intensity adjustment or maintenance:
 This subclass is indented under subclass 100.  Subject matter including modification of the beam source to obtain a desired or constant intensity.
  
[List of Patents for class 369 subclass 117]    117Having movable shutter or light gate:
 This subclass is indented under subclass 100.  Subject matter having a variably positioned radiation blocking element in the radiation beam path.
(1) Note. The position is generally varied by the information signal.

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104,for a ribbon type light modulator.
  
[List of Patents for class 369 subclass 118]    118With detail, configuration, or adjunct of element having slit or aperture in radiation path:
 This subclass is indented under subclass 100.  Subject matter having the structure, shape, or cooperating device of an element blocking all but a limited area of the radiant energy beam.
  
[List of Patents for class 369 subclass 119]    119With movement of optical beam (e.g., galvanometer):
 This subclass is indented under subclass 118.  Subject matter further including periodic variation of the beam position.
  
[List of Patents for class 369 subclass 120]    120Having particular radiation sensor:
 This subclass is indented under subclass 100.  Subject matter wherein structural detail of the beam responsive element is particularly described.
  
[List of Patents for class 369 subclass 121]    121With particular light source (e.g., laser, CRT wit phosphor):
 This subclass is indented under subclass 100.  Subject matter including either structural detail of a light source, or a light source characterized by a function or relationship additional to conventional light emission.
(1) Note. An additional function or relationship would include light coherence or light position control.
(2) Note. The CRT with phosphor herein has position control other than for generating or following plural tracks in the storage medium.

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257Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),   subclasses 13 , 79 through 103 and 918 for incoherent light emitting injection luminescent devices, and subclasses 80-85 for semiconductor light emitting sources combined with semiconductor light responsive devices.
  
[List of Patents for class 369 subclass 122]    122Solid state:
 This subclass is indented under subclass 121.  Subject matter wherein the light source is a solid element emitting light when excited by an electric signal.
(1) Note. Such device are often semiconductive.
  
[List of Patents for class 369 subclass 123]    123Glow lamps:
 This subclass is indented under subclass 121.  Subject matter wherein the light source is a gas discharge device for electric current.
  
[List of Patents for class 369 subclass 124.01]    124.01With details of electrical signal processing:
 This subclass is indented under 100.  Subject matter further including a particularly described step or structure of electrical modification of the information signal.

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48,for information signal processing responsive to a control signal that determines a parameter of the information signal.
59,for information signal processing wherein the signal is a binary signal.
  
[List of Patents for class 369 subclass 124.02]    124.02With transducing multiple tracks:
 This subclass is indented under 124.01.  Subject matter wherein the information signal is processed during information signal storage on or retrieval from a plurality of tracks on a storage medium element.

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95,For information signal processing wherein the information signal are either stored or intended to be retrieved concurrently from plural tracks.
  
[List of Patents for class 369 subclass 124.03]    124.03With transducing using plural beams:
 This subclass is indented under 124.01.  wherein the information signal is processed during information signal storage or retrieval using a plurality of light beams.
  
[List of Patents for class 369 subclass 124.04]    124.04Modulating or demodulating:
 This subclass is indented under 124.01.  Subject matter including step or structure to perform transformation of an input signal into a recording signal by varying amplitude, frequency, or phase using a carrier signal for storage or reverse transformation of a signal reproduced from a storage medium.

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329Demodulators,   appropriate subclasses for frequency, phase, and amplitude demodulation, per se.
332Modulators,   appropriate subclasses for frequency, phase, and amplitude modulation, per se.
348Television,   subclass 724 for modulating television signal.
375Pulse or Digital Communication,   subclasses 271 through 284,302-308, and 322-337 for frequency or phase modulated carrier wave pulse, and subclasses 268, 320, and 353 for pulse amplitude modulation in communication systems, per se.
  
[List of Patents for class 369 subclass 124.05]    124.05Integrating or sampling:
 This subclass is indented under 124.01.  Subject matter including step or structure to obtain an integral value over time or an instantaneous value of an information signal.
  
[List of Patents for class 369 subclass 124.06]    124.06Compressing or decompressing:
 This subclass is indented under 124.01.  Subject matter including step or structure to perform transformation of an input signal into a recording signal by reducing an amount thereof for storage or reverse transformation of a signal reproduced from a storage medium.

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386Motion Video Signal Processing for Recording or Reproducing,   subclasses 353 through 357for compressing or decompressing of video signal during recording or reproduction operations.
  
[List of Patents for class 369 subclass 124.07]    124.07Auxiliary information arrangement processing (e.g., block headers, subcode, or interpolated information, etc.):
 This subclass is indented under 124.01.  Subject matter whereas the information signal is ordered with a particular distribution on a medium to include supplemental information (e.g., block headers, subcode, or interpolated information, etc.).
  
[List of Patents for class 369 subclass 124.08]    124.08Sectioned information processing (e.g., lengths, frames, or blocks, etc.):
 This subclass is indented under 124.01.  Subject matter including step or structure to subdivide an information signal into portions of similar repetitive characteristic (e.g., lengths, frames, blocks, etc.) for storage or to eliminate the subdivisions of the information signal during retrieval.
  
[List of Patents for class 369 subclass 124.09]    124.09Multiplexing or demultiplexing:
 This subclass is indented under 124.01.  Subject matter including step or structure to perform transformation of plural input signals into a recording signal by combining for storage or reverse transformation of a signal reproduced from a storage medium.

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370Multiplex Communications,   appropriate subclasses for multiplexing and demultiplexing of communications in general.
  
[List of Patents for class 369 subclass 124.1]    124.1Gain processing:
 This subclass is indented under 124.01.  Subject matter including step or structure to vary the amplification of an information signal.
  
[List of Patents for class 369 subclass 124.11]    124.11Of retrieved signal:
 This subclass is indented under 124.1.  Subject matter wherein the information signal is a signal reproduced from a storage medium.
  
[List of Patents for class 369 subclass 124.12]    124.12Of signals obtained from photo-detector components:
 This subclass is indented under 124.11.  Subject matter wherein the retrieved signal is obtained from output signals from a plurality of segments of a photo-detector.
  
[List of Patents for class 369 subclass 124.13]    124.13With specific frequency or frequency range:
 This subclass is indented under 124.11.  Subject matter including gain processing of the retrieved signal at a distinct frequency or within a distinct frequency domain.
  
[List of Patents for class 369 subclass 124.14]    124.14Rate, phase, or transient processing:
 This subclass is indented under 124.01.  Subject matter including step or structure to adjust the frequency, phase, or oscillation characteristic of the information signal.
  
[List of Patents for class 369 subclass 124.15]    124.15Level detecting using reference signal:
 This subclass is indented under 124.01.  Subject matter including step or structure to detect an amplitude of an information signal by comparison with a signal that provides a measuring standard.
  
[List of Patents for class 369 subclass 125]    125Having photographic storage medium (e.g., variable density or area):
 This subclass is indented under subclass 100.  Subject matter wherein the storage medium contains a component subject to a radiation induced chemical change, and not classified in a preceding subclass.
(1) Note. The resultant change may take the form of a variation in optical transmissivity or optical track width.

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399Electrophotography,   subclass 10 for storage of data on the operation of an electrophotographic device (i.e., log report) and subclass 83 for job mode selection with memory.
  
[List of Patents for class 369 subclass 126]    126Electrical modification or sensing of storage medium (e.g., capacitive, resistive, electrostatic charge):
 This subclass is indented under subclass 99.  Subject matter wherein the information signal is stored or retrieved by either (a) modulating an electrical property of the storage medium by an electrical transducer, or (b) sensing an electrical property of the storage medium by a transducer electrically related thereto.
(1) Note. Electrical properties may include charge, capacitance, etc.
(2) Note. A charged particle (e.g., electron) beam may be considered either invisible radiation or electrical current depending upon the manner in which such a beam interacts with the storage medium.
  
[List of Patents for class 369 subclass 127]    127Mechanical modification or sensing of storage medium:
 This subclass is indented under subclass 99.  Subject matter wherein the information signal is stored or retrieved by either (a) modulating a mechanical property of the storage medium by a mechanical effect produced by the transducing assembly, or (b) sensing a mechanical property of the storage medium by a transducing assembly mechanically related thereto.
  
[List of Patents for class 369 subclass 128]    128With electrical information signal processing:
 This subclass is indented under subclass 127.  Subject matter including some detail of handling or control of the electrical signal input to or output of the transducing assembly.
(1) Note. Mere mention of connecting means, or wires along the tone arm is not classifiable here.
  
[List of Patents for class 369 subclass 129]    129From information modulated oscillator:
 This subclass is indented under subclass 128.  Subject matter including a source of oscillations controlled or otherwise modulated by the transducing assembly to produce an A.C. signal with an information related parameter.

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8,for similar subject matter combined with a radio.
  
[List of Patents for class 369 subclass 130]    130Sensing of elastic deformation or relaxation of storage medium (e.g., skid type):
 This subclass is indented under subclass 128.  Subject matter including a probe which couples the transducer assembly to the storage medium to cause deformation and to sense the restoring force thereto.
  
[List of Patents for class 369 subclass 131]    131Bidirectional information flow (e.g., record/replay switching):
 This subclass is indented under subclass 128.  Subject matter wherein the signal processing is switchable between a storage and a retrieval mode of information handling.
(1) Note. Typical systems classified here may have an amplifier which is switched between recording and playback modes.
  
[List of Patents for class 369 subclass 132]    132Recording:
 This subclass is indented under subclass 128.  Subject matter limited to signal processing for storing information.
  
[List of Patents for class 369 subclass 133]    133With transformation or intentional distortion of information signal (e.g., compensation for velocity variation with diameter):
 This subclass is indented under subclass 132.  Subject matter wherein the processing includes some intended change in a characteristic of the information signal.
(1) Note. The magnitude control of high frequencies in the information signal (e.g., Dolby) is classified here.

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88,for similar subject matter for stereophonic systems.
  
[List of Patents for class 369 subclass 134]    134With particular amplification characteristic or signal control circuitry (e.g., muting):
 This subclass is indented under subclass 128.  Subject matter having either (a) an amplifier with a particular characteristic (e.g., band-pass), or (b) circuitry for control of a characteristic of the electrical information signal.
(1) Note. A nominally recited amplifier, of itself, is insufficient for classification herein.
(2) Note. Particular control circuitry may be by a switch or a circuitry subsystem, such as muting.
  
[List of Patents for class 369 subclass 135]    135Specified structure of electrical transducing assembly:
 This subclass is indented under subclass 127.  Subject matter including some structural detail of the storage element modifying or sensing device which includes the combination of a complete electricity-force conversion element and a storage medium coupling element.
(1) Note. This may include the subcombination of such a modulating or sensing device, of itself.
(2) Note. Where the modulating or sensing device is described only by name, e.g., "a stylus driving a pickup", without any detail thereof, classification is determined by the combination of such a nominally recited device with the other elements recited.
(3) Note. Where a tone arm is recited with details of the modulating or sensing device, classification is in this or one of the indented subclasses; however, such recitation in further combination with storage medium support or motion production, or with particular circuitry will be classified in the appropriate preceding subclass.

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170+,for stylus coupling devices, in general.
215.1through 230 and 244.1-257, for tone arm devices absent detail of the modifying or sensing device.
  
[List of Patents for class 369 subclass 136]    136Multichannel (stereo cartridge):
 This subclass is indented under subclass 135.  Subject matter wherein one or more transducing assemblies provide a plurality of independent outputs.
(1) Note. The subject matter of this subclass, as a "stereophonic transducer", is a subcombination of the stereo of subclasses 86+ above.
  
[List of Patents for class 369 subclass 137]    137By stress application to solid transducing element (e.g., piezoelectric):
 This subclass is indented under subclass 136.  Subject matter wherein a stylus is coupled to a relatively static transducer element which responds to pressure or other force.
(1) Note. Typical transducer elements will be piezoelectric, electrostrictive, solid state pressure responsive devices, or the like. The term "relatively static" refers to the absence of translatory motion of the transducer element, as a whole.
  
[List of Patents for class 369 subclass 138]    138With adjustable or replaceable stylus coupling structure:
 This subclass is indented under subclass 137.  Subject matter wherein the linkage between stylus and transducer permits selectable change between styli, or facilitates removal and replacement of a stylus assembly.
(1) Note. Typical selectable change is a lever control of either of two differently sized styli.

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171+,for a stylus holder with stylus interchanging structure.
  
[List of Patents for class 369 subclass 139]    139With details of damping or compliance:
 This subclass is indented under subclass 136.  Subject matter wherein an element of the transducing assembly is specified to have either a desired rigidity or stiffness, or elasticity, or absorption as to a dynamic characteristic.
(1) Note. The element having a desired elasticity or absorption may be anywhere in the transducing assembly or support structure, with a control of vibration or resonance.
(2) Note. The stiffness or compliance is usually formed in the stylus lever.

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170,for damping or compliance details of a stylus holder or linkage thereof.
  
[List of Patents for class 369 subclass 140]    140Plural styli:
 This subclass is indented under subclass 135.  Subject matter wherein the mechanical force applying structure includes more than one stylus.
(1) Note. A typical device classified here may have styli of different sizes coupling the storage medium to a monaural cartridge or pickup, with a lever to selectably engage one stylus with the storage medium.
  
[List of Patents for class 369 subclass 141]    141Plural alternative or with signal handling adjunct:
 This subclass is indented under subclass 135.  Subject matter including several transducers only one of which is operative at any time; or an additional device directly cooperating with the transducer for processing either an information signal, or another signal in its place.

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1+,for a system having an alternative signal.
129,for an electromechanical system having switching between a storage and a retrieval mode of operation.
136+,for plural concurrently operative transducers.
  
[List of Patents for class 369 subclass 142]    142Stylus controlled optical element:
 This subclass is indented under subclass 135.  Subject matter wherein the stylus is coupled to an element which controls or affects light.
(1) Note. Typical optical elements may be a vane or mask, or a mirror, in a beam of light.

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359Optical: Systems and Elements,   appropriate subclasses for particular optical elements.
  
[List of Patents for class 369 subclass 143]    143Electron tube:
 This subclass is indented under subclass 135.  Subject matter wherein the stylus is coupled to an element which affects operation of an electron tube.
(1) Note. The operation of the electron tube may be affected by either external (e.g., magnet) or internal (e.g., grid) elements.
  
[List of Patents for class 369 subclass 144]    144Electret or piezoelectric:
 This subclass is indented under subclass 135.  Subject matter wherein the transducer element has a bound electrostatic charge or is otherwise an electrostatic generator.

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307Electrical Transmission or Interconnection Systems,   subclass 400 for electret systems in general.
310Electrical Generator or Motor Structure,   subclasses 311+ for piezoelectric generators.
  
[List of Patents for class 369 subclass 145]    145Semiconductive:
 This subclass is indented under subclass 135.  Subject matter including a force responsive element having an electrical conductivity intermediate that of a conductor and of an insulator.
(1) Note. The element may have a potential barrier layer therein.

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128,for such subject matter with additional information processing circuitry.
144,for piezoelectric semiconductive transducer assemblies.

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257Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),   subclasses 108 and 414-420 for devices responsive to nonelectrical signals, including pressure.
327Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 509+ for miscellaneous externally effected circuits.
  
[List of Patents for class 369 subclass 146]    146Magnetic field variation (e.g., magnetostrictive):
 This subclass is indented under subclass 135.  Subject matter wherein the electrical transducer has magnetic field variation related to the information signal.

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310Electrical Generator or Motor Structure,   appropriate subclasses for generator structure of general utility.
  
[List of Patents for class 369 subclass 147]    147Moving signal coil:
 This subclass is indented under subclass 146.  Subject matter wherein the information signal is generated by, or causes movement of, a coil rigidly connected to the stylus within a magnetic field.
  
[List of Patents for class 369 subclass 148]    148Variable reluctance:
 This subclass is indented under subclass 146.  Subject matter wherein the magnetic field variation is caused by a stylus-linked portion of the magnetic field circuit.
  
[List of Patents for class 369 subclass 149]    149Fixed coil surrounding fixed part of magnetic path:
 This subclass is indented under subclass 148.  Subject matter wherein the information signal is generated in a winding about a stationary portion of the magnetic field circuit.
  
[List of Patents for class 369 subclass 150]    150Capacitive or electrolytic liquid:
 This subclass is indented under subclass 135.  Subject matter wherein the transducer includes a liquid which is specified as having dielectric or conductive properties.

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338Electrical Resistors,   subclasses 80+ for mechanically variable resistors, in general.
361Electricity: Electrical Systems and Devices,   subclasses 280+ for externally variable capacitors, in general.
  
[List of Patents for class 369 subclass 151]    151Electrostatic or capacitive:
 This subclass is indented under subclass 135.  Subject matter wherein the transducer includes an electric field and electrodes related thereto.

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361Electricity: Electrical Systems and Devices,   subclasses 277+ for variable capacitors, in general.
  
[List of Patents for class 369 subclass 152]    152Variable resistance:
 This subclass is indented under subclass 135.  Subject matter wherein the transducer has an electric circuit element, the resistance of which is varied in accordance with the information.

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323Electricity: Power Supply or Regulation Systems,   subclasses 291+ and especially 298+ for variable resistance controlled circuits not limited to stylus control of the resistance.
338Electrical Resistors,   subclasses 68+ for mechanically variable resistors, in general.
  
[List of Patents for class 369 subclass 153]    153Including treatment to facilitate storage (e.g., storage medium softening):
 This subclass is indented under subclass 127.  Subject matter including treatment of the storage medium surface to produce a modification in a physical characteristic thereof.
(1) Note. Examples of such treatment include softening of the storage medium and erasure of a previous track by scraping or abrading.

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82Turning,   subclass 1.12 for record disc erasing not combined with mechanical storage thereon.
264Plastic and Nonmetallic Article Shaping or Treating: Processes,   subclass 36.13 for a process of record disc erasing by shaping, not combined with mechanical storage thereon.
  
[List of Patents for class 369 subclass 154]    154Heating (e.g., heated stylus):
 This subclass is indented under subclass 153.  Subject matter including the application of heat to the storage medium.
(1) Note. The heat may be applied indirectly, e.g., through the stylus.

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219Electric Heating,   appropriate subclasses for electric heating of general utility.
  
[List of Patents for class 369 subclass 155]    155Mechanical conversion to or from sound:
 This subclass is indented under subclass 127.  Subject matter wherein the storage medium sensing or modulating element is mechanically coupled to a sound transmitting or responsive solid element (e.g., diaphragm), so as to directly couple the elements.
(1) Note. The sensing or modulating element is usually in physical contact with the storage element.
(2) Note. The term "mechanical" includes a fluidic coupling.
(3) Note. Such devices with sound boxes or acoustical tone arms are classified here, however, the subcombination limited thereto are classified in the indented subclasses 157-169.
  
[List of Patents for class 369 subclass 156]    156Including fluid coupling in force linkage:
 This subclass is indented under subclass 155.  Subject matter including two diaphragms coupled by an enclosed fluid.
  
[List of Patents for class 369 subclass 157]    157Sound box with mounting structure:
 This subclass is indented under subclass 155.  Subject matter limited to a stylus coupled acoustical resonator and mounting means therefor.

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155,for similar structure combined with storage medium support or movement device.
  
[List of Patents for class 369 subclass 158]    158Acoustical tone arm:
 This subclass is indented under subclass 155.  Subject matter limited to a tone arm with acoustical coupling structure.

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155,for such structure combined with storage medium support or movement devices.
244.1through 257, for tone arms, in general.
  
[List of Patents for class 369 subclass 159]    159Having plural acoustical paths:
 This subclass is indented under subclass 158.  Subject matter in which the acoustical coupling structure includes a plurality of acoustical energy conducting passages through which such energy may travel simultaneously.
(1) Note. Such structure may include two acoustical conduits driven in a mechanical push-pull relationship by a single stylus.
  
[List of Patents for class 369 subclass 160]    160Sound box:
 This subclass is indented under subclass 155.  Subject matter limited in extent to a stylus coupled acoustical resonator, a casing therefor, or a mechanical linkage used therein.

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155,for such structure combined with storage medium support or movement devices.
  
[List of Patents for class 369 subclass 161]    161With interchangeable styli:
 This subclass is indented under subclass 160.  Subject matter having plural styli selectively coupled in cooperative relationship with the acoustical resonator.

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171+,for stylus holders with interchangeable styli, in general.
  
[List of Patents for class 369 subclass 162]    162Including stylus pivoted from fixed casing:
 This subclass is indented under subclass 160.  Subject matter having a stylus having a tracking motion limited to an angular displacement about its support from an immovable casing.
  
[List of Patents for class 369 subclass 163]    163With sound modification:
 This subclass is indented under subclass 160.  Subject matter having acoustical structure for amplifying, muffling or filtering the incident or reproduce sound.

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167,for mechanical amplification of sound box vibration.

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181Acoustics,   for structure to handle sound, in general.
  
[List of Patents for class 369 subclass 164]    164Convertible between lateral and perpendicular modulation modes:
 This subclass is indented under subclass 160.  Subject matter including structure to cause or respond to stylus vibrations in two planes, one being normal and the other parallel to the record medium surface.
(1) Note. Such structure in a reproducer may be unitary or alternative.
  
[List of Patents for class 369 subclass 165]    165Perpendicular mechanical modulation:
 This subclass is indented under subclass 160.  Subject matter wherein the sound box causes or is responsive to stylus vibration in a plane normal to the surface of the storage medium.
  
[List of Patents for class 369 subclass 166]    166Recording:
 This subclass is indented under subclass 165.  Subject matter wherein the stylus modulates the storage medium by cutting its surface.
  
[List of Patents for class 369 subclass 167]    167With mechanical amplification (e.g., friction coupling):
 This subclass is indented under subclass 165.  Subject matter having structure to increase the amplitude of the mechanical vibrations of the elements coupling the stylus and acoustical resonator.
(1) Note. Such structure is often a frictional linkage to an auxiliary vibrating structure.

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163,for sound boxes having acoustical, rather than mechanical, amplification.
  
[List of Patents for class 369 subclass 168]    168Floating weight:
 This subclass is indented under subclass 165.  Subject matter having a stylus supporting lever with counterbalancing weight structure to minimize or eliminate the weight applied by the stylus.

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254,for tone arm counterbalancing weight structure, in general.
  
[List of Patents for class 369 subclass 169]    169Lateral mechanical modulation:
 This subclass is indented under subclass 160.  Subject matter wherein the sound box causes or is responsive to stylus vibration in a plane tangent, or parallel the surface of the storage medium.
  
[List of Patents for class 369 subclass 170]    170Stylus holder or shield:
 This subclass is indented under subclass 127.  Subject matter limited in extent to a support or a protecting device for the storage medium engaging element with or without such element.

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135+,for such holders combined with electrical transducing structure.