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 [Search a list of Patent Appplications for class 360]   CLASS 360,DYNAMIC MAGNETIC INFORMATION STORAGE OR RETRIEVAL
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SECTION I - CLASS DEFINITION

GENERAL STATEMENT OF THE CLASS SUBJECT MATTER

This class is an integral part of Class 369, Dynamic Information Storage or Retrieval, following subclass 18 and is the specific class for apparatus and corresponding processes for the storage and retrieval of information based on relative movement between a magnetic record carrier and a transducer.

This class also includes apparatus and corresponding processes for making copies or editing of records falling within the above definition.

A magnetic record carrier within the meaning of this class is an element which consists of a magnetizable material or is comprised of a coating or impregnation of magnetizable material which is intended for the storage of more than a single bit of information. Storage elements which include discrete magnetic areas, inserts, spots, etc. each intended for the storage of single bits of information, whether or not relative motion is used in transducing that information, are not included in the above definition. See elsewhere for the use of such elements. (See References to Other Classes, below.)

SUBCOMBINATIONS OF DYNAMIC MAGNETIC RECORDERS OR REPRODUCERS

This class includes elements forming subcombinations specific to apparatus within the class definition such as record carriers, transducers, etc.

Electrical circuits not specific to magnetic recording or reproducing which may constitute subcombinations of such apparatus are classified in the appropriate class for such circuits.

Mechanisms forming subcombinations of apparatus within the class definition are classified in the appropriate mechanical class providing for such subject matter unless claimed in significant combination with specific recorder structure.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

COMBINATIONS OF OTHER APPARATUS WHICH INCLUDE APPARATUS OF THIS CLASS

Significantly claimed apparatus external to this class, claimed in combination with apparatus under the class definition, which records or reproduces some quality or quantity related to such external apparatus or its function, is classified in the class appropriate to the external apparatus.

Nominally claimed apparatus external to this class, claimed in combination with apparatus under the class definition, is classified in this class unless provided for in the appropriate external class.

Because of the placement of Class 360 into the Class 369 schedule, this class is no longer exhaustive of dynamic magnetic storage or retrieval, as to the art now classified in subclasses 1 through 18 of Class 369.

ORGANIZATION OF THIS CLASS

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

SECTION III - SUBCLASS REFERENCES TO THE CURRENT CLASS

SEE OR SEARCH THIS CLASS, SUBCLASS:

1,through 17, Special Purpose Devices: devices where the major significance of the device is in its use or the result which it produces.
18,through 54, Signal Processing: for devices which are basically electronic in nature and are used to modify, correct or insure the efficient storage or retrieval of information signals.
55,through 68, General Recording or Reproducing: for methods or devices which are concerned with the physics of recording or reproducing or are electronic in nature and not limited to the types of signal processing provided for in Lines With Other Classes and Within this Class, Organization of This Class, above.
69,through 80, Automatic Control Systems: for devices which, without proximate human intervention, will actively control a mechanism of this or an external class.
81,through 101, Transport Systems: for mechanical devices which produce the relative movement between record carrier and transducer required by the class definition.
102,through 136, Physical Elements: for physical elements forming subcombinations of apparatus within the class definition that are not classifiable elsewhere.
137,for subject matter not found in subclasses 1-136.

SECTION IV - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

29Metal Working,   subclasses 603.01+ for, methods of making magnetic transducers.
84Music,   subclasses 601+ , recording or reproducing means in combination with musical instruments.
106Compositions: Coating or Plastic,   plastic compositions usable in magnetic record carriers.
118Coating Apparatus,   apparatus for making coated magnetic record carriers.
148Metal Treatment,   subclasses 300+ , magnetic stock material which is the result of a Class 148 treatment or which are claimed in terms of specific magnetic properties.
178Telegraphy,   recording or reproducing means combined with code transmitters or receivers.
200Electricity: Circuit Makers and Breakers,   switching devices usable in magnetic recorders or reproducers.
206Special Receptacles and Packages,   subclass 62, receptacles for magnetic record carriers.
226Advancing Material of Indeterminate Length,   means for advancing a record carrier past a transducer.
235Registers,   subclasses 419+ , for record controlled electromechanical calculators; subclasses 439+ and 487+, sensing or analyzing mechanism and records; subclass 154, data conversion usable in magnetic recording or reproducing.
235Registers,   subclasses 449+ and 493 for the use of storage elements which include discrete magnetic areas, inserts, spots, etc., each intended for the storage of single bits of information, whether or not relative motion is used in transducing that information. (Class Definition, General Statement Of The Class Subject Matter, above).
242Winding, Tensioning, or Guiding,   provides for technology centered on refinements of winding or unwinding, tensioning and guiding elongated material combined with a nominal work station. Accordingly Class 242 provides for inventions in winding and unwinding of magnetic tape, film, or wire where an element such as a transducer head or similar recording structure is named as a part of the winding or unwinding path. Class 360 provides for winding or guiding of a magnetic medium in combination with claimed magnetic recording or reproducing apparatus (i.e., transducing head details or closely related structure that impact the transducing function unique to this art). Class 360 provides for claimed information erasure prevention means (other than a nominally recited pin or filler), details of a single recording element (e.g., a multitract transducing head), means to extract a loop of tape from the cartridge and transfer the loop about a named transducer head, a plurality of elements peculiar to a recorder (e.g., alternately engageable record and erase heads), or structure peculiar to a recorder completely remote from winding, tensioning, or guiding (e.g., signal volume control). Search Class 242 for unwinding/rewinding drives, and subcombinations such as cartridge/cassette structure and related perfecting feature; e.g., position retainers, brakes, brake release devices, door structures, pinch rollers, guide components, cartridge/cassette housing construction and material having a specific composition, hardness, thermal property, electrical property, antistatic property, etc., particularly subclasses 324+ for unwinding and rewinding an information convertible carrier, and 335+ for guiding, unwinding, or rewinding a carrier stored in a cartridge/cassette.
252Compositions,   subclasses 62.51+ , magnetic compositions.
271Sheet Feeding or Delivering,   sheet record handling.
307Electrical Transmission or Interconnection Systems; subclasses 112+ , class appropriate switching systems which are usable in dynamic information storage or retrieval.
318Electricity: Motive Power Systems,   subclasses 560+ , positional servo systems; subclasses 567+, program or pattern controlled systems.
324Electricity: Measuring and Testing,   subclass 244 , magnetic field testing means usable in reproducing magnetic records; subclass 112, voltage or current storage means including magnetic storage.
326Electronic Digital Logic Circuitry,   appropriate subclasses, electronic digital logic circuits usable in dynamic magnetic information storage or retrieval.
327Miscellaneous Active Electrical Nonlinear Devices, Circuits,   and Systems; subclasses 1+ for miscellaneous signal discriminating or selecting; subclasses 100+, miscellaneous signal conversion, shaping or generating; subclasses 365+, miscellaneous gating usable in dynamic magnetic information storage or retrieval.
329Demodulators,   demodulators usable in magnetic reproduction.
330Amplifiers,   amplifiers usable in magnetic recording or reproducing.
331Oscillators,   oscillators usable in bias or erase circuits.
332Modulators,   modulators usable in magnetic recording.
333Wave Transmission Lines and Networks,   subclass 28 , equalizers usable in magnetic recording or reproducing.
336Inductor Devices,   core and coil structures similar to those of magnetic recording or reproducing transducers.
341Coded Data Generation or Conversion,   for code converters usable in or using dynamic storage techniques.
345Computer Graphics Processing and Selective Visual Display Systems,   subclasses 418 through 475for computer graphics processing.
346Recorders,   recorders usually of the graphic type and record carriers therefor.
352Optics: Motion Pictures,   motion picture apparatus in combination with recorders or reproducers.
353Optics: Image Projectors,   Projectors combined with recorders or reproducers.
358Facsimile and Static Presentation Processing,   subclasses 1.1 through 1.18for data processing for static presentation on fixed medium (e.g., for printer).
359Optical: Systems and Elements,   subclasses 281+ and 484.01 through 484.1, magneto-optical polarization devices usable in magnetic signal reproduction.
361Electricity: Electrical Systems and Devices,   subclasses 143+ , 159 and 267 for demagnetizing means for records and heads when not in combination with recorders or reproducers.
365Static Information Storage and Retrieval,   appropriate subclass for magnetic, electric, or optical static storage/retrieval of information.
370Multiplex Communications,   appropriate subclasses, particularly subclasses 351+ for multiplex switching, and subclass 531 for magnetic core for switching or storage.
379Telephonic Communications,   subclass 41 , 51 and 67.1+, recorders or reproducers combined with telephones.
384Bearings,   subclasses 100+ for fluid bearings usable to space head from magnetic record carriers.
386Motion Video Signal Processing for Recording or Reproducing,   appropriate subclasses for recording television or video signal.
400Typewriting Machines,   appropriate subclasses for machine operators using magnetic records.
420Alloys or Metallic Compositions,   appropriate subclasses for alloys which are claimed broadly as "magnetic," "magnetized," or "permanent magnet" or alloys defined only in terms of their composition which are inherently magnetic.
427Coating Processes,   methods of making and coating magnetic record carriers.
428Stock Material or Miscellaneous Articles,   subclasses 800 through 848.9for magnetic heads, and magnetic and magneto-optic storage medium, per se, having specific detail of physical chemistry or composition (e.g., material, microstructure, surface property, etc.).
430Radiation Imagery Chemistry: Process, Composition, or Product Thereof,   appropriate subclasses for radiation imagery chemistry process, composition, or product used as a storage medium.
434Education and Demonstration,   recording or reproducing means combined with significant education apparatus.
505Superconductor Technology: Apparatus, Material, Process,   subclasses 150+ for high temperature (Tc > 30 K) superconducting devices, particularly subclasses 170+ for dynamic information storage or retrieval.
700Data Processing: Generic Control Systems or Specific Applications,   subclasses 1 through 89for generic data processing control systems; and subclasses 90-306 for particular application of data processing systems or calculating computers, particularly subclasses 245-264 for data processing of robot control systems.
704Data Processing: Speech Signal Processing, Linguistics, Language Translation and Audio Compression/Decompression,   subclasses 200+ for artificial intelligence systems that process speech signals.
706Data Processing: Intelligent Processing Systems and Methods,   various subclasses for artificial intelligence systems that represent, apply, and acquire knowledge.
708Electrical Computers: Arithmetic Processing and Calculating,   subclasses 1+ for hybrid computers, subclasses 100+ for digital calculating computers, and subclasses 800+ for analog computers.
709Electrical Computers and Digital Data Processing Systems: Multiple Computer or Process Coordinating,   appropriate subclassesfor data transferring among multiple computer and digital processing systems.
711Electrical Computers and Digital Processing Systems: Memory,   appropriate subclasses for storage addressing, accessing, and control in data processing systems; 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.
714Error Detection/Correction and Fault Detection/Recovery,   appropriate subclasses for generic error checking systems.
715Data Processing: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing,   subclasses 700 through 866for a computer operator interface.
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.

SUBCLASSES

[List of Patents for class 360 subclass 1]    1RECORDING ON OR REPRODUCING FROM AN ELEMENT OF DIVERSE UTILITY:
 This subclass is indented under the class definition.  Subject matter which includes recording on or reproducing from an element which has utility in addition to being a magnetic record carrier.
(1) Note. Examples of devices classified herein are devices which record on or reproduce from razor blades, tire beads, food cans, price tags, etc.
(2) Note. Elements used as record carriers in this and indented subclasses which are not inherently magnetic may have magnetic strips, coatings or other magnetic elements affixed thereto to allow for their use as magnetic record carriers.
  
[List of Patents for class 360 subclass 2]    2Card:
 This subclass is indented under subclass 1.  Subject matter wherein the element used as a record carrier is in a flat geometric form.

SEE OR SEARCH CLASS:

235Registers,   subclass 449 and 450 for sensing mechanisms utilized to sense discrete bits of magnetic material, the discrete bits being coded markings on a record.
434Education and Demonstration,   subclass 308 and indented subclasses, particularly subclasses 311+ for card shaped elements used in teaching and having information recorded thereon.
  
[List of Patents for class 360 subclass 3]    3Motion picture film:
 This subclass is indented under subclass 1.  Subject matter wherein the element used as a record carrier is a motion picture film.

SEE OR SEARCH CLASS:

352Optics: Motion Pictures,   subclasses 1+ for sound recording and reproducing combined with motion pictures.
  
[List of Patents for class 360 subclass 4]    4MANUAL INPUT RECORDING:
 This subclass is indented under the class definition.  Subject matter including apparatus which is to be manually manipulated and it is the manipulation of such apparatus which generates the information signal that is to be recorded.

SEE OR SEARCH CLASS:

400Typewriting Machines,   appropriate subclasses for machine operators including magnetic records.
  
[List of Patents for class 360 subclass 5]    5RECORDING FOR SELECTIVE RETENTION OF A SPECIAL OCCURRENCE:
 This subclass is indented under the class definition.  Subject matter for automatically sensing the occurrence of a condition, retaining information concerning that occurrence and deleting or disregarding unwanted information.
(1) Note. Examples of devices classified herein are crash, transient and surveillance recorders.

SEE OR SEARCH CLASS:

369Dynamic Information Storage or Retrieval,   subclasses 47.36 through 47.55for mechanism control by control signal.
  
[List of Patents for class 360 subclass 6]    6RECORDING COMBINED WITH METERING OR SENSING:
 This subclass is indented under the class definition.  Subject matter in combination with meters or sensors of particular application.
(1) Note. See Lines With Other Classes and Within This Class, Combinations of Other Apparatus Which Include Apparatus of This Class, in the Class Definition, above.
(2) Note. Examples of devices classified herein are recorders associated with utility meters, sensors of seismic or other natural phenomena and body tissue analyzing devices.
(3) Note. Ordinary sound microphones and video cameras are not considered sensors of particular application as defined above. Recorders in combination with such microphones or cameras are classified in subclasses provided below.

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346Recorders,   subclasses 14 through 18,for non-magnetic recorders combined with registers, indicators or alarms.
  
[List of Patents for class 360 subclass 7]    7RECORDING FOR MONETARY DELAY OF AN ANALOG SIGNAL:
 This subclass is indented under the class definition.  Subject matter wherein a nondigital signal is recorded and momentarily reproduced for the specific purpose of introducing a delay in the signal.
(1) Note. Apparatus classified herein is used for purposes such as censoring and generating artificial reverberation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

54,for recirculation or delay of a digital signal.
  
[List of Patents for class 360 subclass 8]    8RECORDING FOR CHANGING DURATION, FREQUENCY OR REDUNDANT CONTENT OF AN ANALOG SIGNAL:
 This subclass is indented under the class definition.  Subject matter specifically arranged for recording or reproducing a signal in such a manner that the signal, as recorded, has redundant portions deleted therefrom or, as reproduced, occupies a different amount of time or a different band of frequencies than that occupied by the original signal.
(1) Note. Changes in either or both of duration and frequency may be produced by the subject matter of this and indented subclasses.

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704Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,   subclasses 500 through 504for bandwidth, or time compression, or expansion of audio signals.
  
[List of Patents for class 360 subclass 12]    12RECORDING OR REPRODUCING FOR AUTOMATIC ANNOUNCING:
 This subclass is indented under the class definition.  Subject matter for recording or reproducing information in such a manner that an appropriate announcement may be selected or synthesized in response to a sensed condition or predetermined command.
(1) Note. Examples of devices classified herein are: Time or temperature announcing machines, talking voltmeters and travelogue reproducers responsive to location.

SEE OR SEARCH CLASS:

379Telephonic Communications,   subclasses 41 and 67+ for subject matter of this type in combination with a telephone.
  
[List of Patents for class 360 subclass 13]    13RECORD EDITING:
 This subclass is indented under the class definition.  Subject matter for deleting, adding or rearranging portions of a recording.
(1) Note. Both manual cutting and splicing of record carrier portions and reproducing from one record carrier and recording onto the same or another record carrier are included in this subclass.
  
[List of Patents for class 360 subclass 15]    15RECORD COPYING:
 This subclass is indented under the class definition.  Subject matter for duplicating records.

SEE OR SEARCH CLASS:

369Dynamic Information Storage or Retrieval,   subclasses 84+ for duplicating nonmagnetic sound records.
  
[List of Patents for class 360 subclass 16]    16Contact transfer:
 This subclass is indented under subclass 15.  Subject matter wherein a blank record carrier is placed in contact with the record carrier to be copied and duplication occurs at the point of contact.
  
[List of Patents for class 360 subclass 17]    17With magnetic bias:
 This subclass is indented under subclass 16.  Subject matter wherein a magnetic field in addition to that of the record carrier to be copied is applied at the point of contact.
  
[List of Patents for class 360 subclass 18]    18RECORDING OR REPRODUCING PLURAL INFORMATION SIGNALS ON THE SAME TRACK:
 This subclass is indented under the class definition.  Subject matter wherein separate information signals are recorded in such a manner that they occupy co-extensive or overlapping areas on a record carrier and, during reproduction, are again separable.
(1) Note. Separable components of single signals such as video and synchronizing components of a normal television signal or data and timing components of a digital signal are not considered separate information signals within the meaning of the above definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

33+,for recording television signals including synchronizing components.
39+,for recording digital signals including timing components.

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370Multiplex Communications,   appropriate subclasses for multiplexing systems and techniques.
  
[List of Patents for class 360 subclass 20]    20Frequency multiplex:
 This subclass is indented under subclass 18.  Subject matter wherein the separate signals occupy different frequency bands.
  
[List of Patents for class 360 subclass 21]    21Head gap azimuth multiplex:
 This subclass is indented under subclass 18.  Subject matter wherein the separate signals are recorded using a head or heads with gaps positioned at different angles with respect to the record carrier for each of the separate signals.
  
[List of Patents for class 360 subclass 22]    22SPLITTING ONE INFORMATION SIGNAL FOR RECORDING ON PLURAL DISTINCT TRACKS OR REPRODUCING SUCH SIGNAL:
 This subclass is indented under the class definition.  Subject matter wherein a single information signal is divided and recorded on plural distinct tracks or reproduced from such tracks and recombined into a single signal.
(1) Note. Transverse track portions such as that produced by moving a head at an angle to the direction of movement of a tape are not considered distinct tracks within the meaning of the above definition.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26,for electronically correcting phasing errors between signals which may be recorded on plural distinct tracks.
76,for physically moving a multi-track head with respect to a record for skew correction.
  
[List of Patents for class 360 subclass 23]    23Time division:
 This subclass is indented under subclass 22.  Subject matter wherein the signal is divided into increments separate in time and sequential increments are commutated between plural distinct tracks.
  
[List of Patents for class 360 subclass 24]    24SPLITTING, PROCESSING AND RECOMBINING ONE INFORMATION SIGNAL FOR RECORDING OR REPRODUCING ON THE SAME TRACK:
 This subclass is indented under the class definition.  Subject matter wherein a signal is divided, the divided portions are separately processed and are then recorded on the same track of a record carrier.
(1) Note. Apparatus wherein a single reproduced signal is divided, separately processed and recombined is also included in this subclass.

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327Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 407+ for miscellaneous gating of plural inputs to a single output.
  
[List of Patents for class 360 subclass 25]    25CHECKING RECORD CHARACTERISTICS OR MODIFYING RECORDING SIGNAL FOR CHARACTERISTIC COMPENSATION:
 This subclass is indented under the class definition.  Subject matter wherein the characteristics of a particular record carrier are determined or a signal to be recorded is modified to compensate for the determined characteristics of a particular record carrier.
(1) Note. Examples of record carrier characteristics are: inhomogeneous magnetic coating, incomplete erasure of a prior recording and peculiar hysteresis.
(2) Note. Characteristics of magnetic recording or reproducing which are dictated by physical law and are not attributable to peculiarities of the record carrier are not included in this subclass.

SEE OR SEARCH THIS CLASS, SUBCLASS:

65,for equalization circuits.
  
[List of Patents for class 360 subclass 26]    26ELECTRONICALLY CORRECTING PHASING ERRORS BETWEEN RELATED INFORMATION SIGNALS:
 This subclass is indented under the class definition.  Subject matter which is electronic in nature (e.g., adjustable delay lines, gates, registers) for producing time coincidence between plural related information signals.

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51,for apparatus which corrects timing errors in a digital signal.
76,for apparatus which physically moves multiple track heads to produce an effect similar to that of the apparatus of this subclass.

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386Motion Video Signal Processing for Recording or Reproducing,   subclass 274 for phase-crosstalk correction, subclass 310 for phase shifting a frequency modulated luminance or chrominance of a color video signal, and subclass 312 for phase modulation of a luminance or chrominance of a color video signal in a video recording and reproduction device.
714Error Detection/Correction and Fault Detection/Recovery,   the appropriate subclass for an error checking system and subclass 700 for generic skew detection or correction.
  
[List of Patents for class 360 subclass 27]    27RECORDING OR REPRODUCING AN INFORMATION SIGNAL AND A CONTROL SIGNAL FOR CONTROLLING ELECTRONICS OF REPRODUCER:
 This subclass is indented under the class definition.  Subject matter wherein, during recording of an information signal, a control signal is generated and recorded and is used during reproduction to control the electronic circuitry through which the information signal is processed.
(1) Note. The control signal used herein is distinct from or in addition to the normal clock and synchronizing signals associated with digital and video signals, respectively.

SEE OR SEARCH THIS CLASS, SUBCLASS:

13+,for magnetic record editing where a recorded control signal may be used.
51,for controlling digital signal reproduction using clock signals.
69+,for controlling the recorder mechanism in response to a recorded control signal.

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386Motion Video Signal Processing for Recording or Reproducing,   appropriate subclasses for recording television or video signal, particularly subclasses 239 through 262for generating additional data useful in processing or controlling of a video signal in a video recording and reproduction device.
  
[List of Patents for class 360 subclass 28]    28Reference carrier to control demodulator:
 This subclass is indented under subclass 27.  Subject matter wherein the control signal is a recorded reference carrier which is used to control the demodulation of the reproduced information signal.
  
[List of Patents for class 360 subclass 29]    29MODULATING OR DEMODULATING:
 This subclass is indented under the class definition.  Subject matter including specific modulator or demodulator circuitry or techniques.

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329Demodulators,   appropriate subclasses for demodulators of general utility.
332Modulators,   appropriate subclasses, for modulators and demodulators of general utility.
  
[List of Patents for class 360 subclass 30]    30Frequency:
 This subclass is indented under subclass 29.  Subject matter including specific frequency modulation or demodulation of a signal.
  
[List of Patents for class 360 subclass 31]    31MONITORING OR TESTING THE PROGRESS OF RECORDING:
 This subclass is indented under the class definition.  Subject matter wherein, during recording, the recorded information signal is reproduced in whole or in part for qualitative analysis of the operation of the recorder system or a part thereof.

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25,for record carrier characteristic determination and compensation.
53,for digital data error checking.
  
[List of Patents for class 360 subclass 32]    32CONVERTING AN ANALOG SIGNAL TO DIGITAL FORM FOR RECORDING; REPRODUCING AND RECONVERTING:
 This subclass is indented under the class definition.  Subject matter including producing a digital equivalent of a nondigital signal for recording, or producing a nondigital equivalent of a reproduced digital signal.

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235Registers,   subclasses 321+ , for analog-digital converters.
  
[List of Patents for class 360 subclass 39]    39GENERAL PROCESSING OF A DIGITAL SIGNAL:
 This subclass is indented under the class definition.  Subject matter of specific utility in treating a digital signal for recording or reproducing.
(1) Note. This subclass is the residual area for devices and methods concerned with processing digital signals in a manner not provided for above. Digital signal processing properly classified above should not, as a matter of course, be cross-referenced here.
(2) Note. Although specific mechanical apparatus may be included in the subject matter of this and indented subclasses, the subject matter herein remains generally electronic in nature and its utility is in distinctive handling of a digital signal.

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55+,for generally usable recording or reproducing techniques.
69+,for automatically controlling recorder or reproducer mechanisms.
79,for recorder or reproducer control of an external device
81+,88 and 101, for recorder or reproducer mechanisms.
220through 224, 230-237.1, 240-246.8, 110-130.34, and 131-136, for recorder or reproducer elements.

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178Telegraphy,   appropriate subclasses, particularly 17+ for code recorders.
235Registers,   subclasses 61+ , for calculators combined with recorders.
326Electronic Digital Logic Circuitry,   for electronic digital circuits operating on a digital signal.
327Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 1+ for pulse discriminating or selecting and subclasses 100+ for pulse parameter (e.g., amplitude) control.
341Coded Data Generation or Conversion,   subclass 15 for a magnetic pattern reading type analog to digital converter and subclasses 50+ for code converters.
365Static Information Storage and Retrieval,   appropriate subclass for the static storage/retrieval of information.
700Data Processing: Generic Control Systems or Specific Applications,   subclasses 1 through 89for general-purpose digital control systems (e.g., computer arrangements for open and closed loop feedback control).
708Electrical Computers: Arithmetic Processing and Calculating,   subclasses 100+ for digital calculating computers and generic digital arithmetic processing circuits and methods.
711Electrical Computers and Digital Processing Systems: Memory,   subclasses 1+ for addressing combined with specific memory configurations (e.g., extended, expanded, dynamic, etc.) in a digital data processing system, subclasses 100+ for generalized address forming, and subclasses 200+ for generalized storage accessing and control in a digital data processing system.
714Error Detection/Correction and Fault Detection/Recovery,   subclasses 1+ for reliability and availability in a digital data processing system.
  
[List of Patents for class 360 subclass 40]    40In specific code or form:
 This subclass is indented under subclass 39.  Subject matter including generating a waveform from digital data or reproducing such a waveform, the frequency, shape, polarity or other characteristic thereof being indicative of the digital data.

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341Coded Data Generation or Conversion,   appropriate subclasses for code converters.
  
[List of Patents for class 360 subclass 41]    41Nonreturn to zero:
 This subclass is indented under subclass 40.  Subject matter wherein a first or opposite polarization of the record throughout an entire bit cell is indicative of a first or second binary digit and transitions in polarity occur only between unlike digits. Example:

Image 1 for class 360 subclass 41

  
[List of Patents for class 360 subclass 42]    42Phase code:
 This subclass is indented under subclass 40.  Subject matter wherein a transition in polarity in a first direction is indicative of a first binary digit and a transition in polarity in an opposite direction is indicative of the second binary digit. Example:

Image 1 for class 360 subclass 42

  
[List of Patents for class 360 subclass 43]    43Multi-frequency:
 This subclass is indented under subclass 40.  Subject matter wherein a first binary digit is indicated by one full cycle of the waveform per bit cell and the second binary digit is indicated by one-half cycle of the waveform per bit cell. Example:

Image 1 for class 360 subclass 43

  
[List of Patents for class 360 subclass 44]    44Intra-cell transition:
 This subclass is indented under subclass 40.  Subject matter wherein a transition in polarity occurs within the boundaries of each bit cell and the position of that transition is indicative of the data recorded. Example:

Image 1 for class 360 subclass 44

  
[List of Patents for class 360 subclass 45]    45Pulse crowding correction:
 This subclass is indented under subclass 39.  Subject matter wherein the fringing effects of high density recording are subdued.
  
[List of Patents for class 360 subclass 46]    46Head amplifier circuit:
 This subclass is indented under subclass 39.  Subject matter including circuitry proximate to the recording transducer for producing sufficient current in response to an input signal to properly polarize the record.
  
[List of Patents for class 360 subclass 47]    47Redundant or complimentary tracks:
 This subclass is indented under subclass 39.  Subject matter wherein the same data is recorded in plural tracks in the same or complimentary forms.
  
[List of Patents for class 360 subclass 48]    48Data in specific format:
 This subclass is indented under subclass 39.  Subject matter wherein the data is recorded in words or blocks of specific numbers of bits or wherein words or blocks of data are arranged in a specific manner on the record.
  
[List of Patents for class 360 subclass 49]    49Address coding:
 This subclass is indented under subclass 39.  Subject matter including specific patterns of digits which are used to indicate the location of selected blocks of data.

SEE OR SEARCH THIS CLASS, SUBCLASS:

72,for automatically positioning a par- ticular portion of a record carrier at a transducing station.
  
[List of Patents for class 360 subclass 50]    50Inter-record gap processing:
 This subclass is indented under subclass 39.  Subject matter including controlling the spacing between blocks of data.
  
[List of Patents for class 360 subclass 51]    51Data clocking:
 This subclass is indented under subclass 39.  Subject matter including developing or using a timing signal for gating digits or data during recording or reproducing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

26,for electronic skew correction using data clocking.
  
[List of Patents for class 360 subclass 52]    52With incremental movement between record and head:
 This subclass is indented under subclass 51.  Subject matter including producing an increment of movement between record and head for each digit of data transduced.
  
[List of Patents for class 360 subclass 53]    53Data verification:
 This subclass is indented under subclass 39.  Subject matter including checking reproduced data for errors in content.

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714Error Detection/Correction and Fault Detection/Recovery,   appropriate subclasses for error checking system.
  
[List of Patents for class 360 subclass 54]    54Data recirculation:
 This subclass is indented under subclass 39.  Subject matter including recording, reproducing and re-recording data in one continuing operation.

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7,for momentary delay of an analog signal.
  
[List of Patents for class 360 subclass 55]    55GENERAL RECORDING OR REPRODUCING:
 This subclass is indented under the class definition.  Subject matter including the use of magnetic or other physical phenomena, specific techniques or specific circuitry for magnetically recording or reproducing information in any signal form.
(1) Note. This subclass is the residual area for devices and methods concerned with processing of signals in a manner not provided for above. Subject matter properly classified above should not, as a matter of course, be cross-referenced here.
(2) Note. Documents including general descriptions of the phenomena of magnetic recording but are principally concerned with mechanisms or elements falling within the class definition should not be classified in this subclass. See mechanism or element subclasses below.
  
[List of Patents for class 360 subclass 57]    57Selective erase recording:
 This subclass is indented under subclass 55.  Subject matter including recording information by selectively erasing a prerecorded signal.
  
[List of Patents for class 360 subclass 58]    58Boundary displacement recording or transducers:
 This subclass is indented under subclass 55.  Subject matter including shifting the boundary between oppositely polarized regions of a record carrier in response to an information signal.
  
[List of Patents for class 360 subclass 59]    59Thermomagnetic recording or transducers:
 This subclass is indented under subclass 55.  Subject matter including changing the coercivity of a record carrier by applying heat thereto in proportion to an information signal or in addition to a magnetic field which is proportional to an information signal.

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16+,for thermo-magnetic record copying.

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346Recorders,   subclass 74.2 , for thermo- magnetic pictorial recording.
  
[List of Patents for class 360 subclass 60]    60Recording-or erasing-prevention:
 This subclass is indented under subclass 55.  Subject matter including sensing or indicating the existence of an earlier recording on a record carrier and preventing erasure or double exposure of the carrier.

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705Data Processing: Financial, Business Practice, Management, or Cost/Price Determination,   subclasses 51 through 54for usage protection of a distributed data file.
  
[List of Patents for class 360 subclass 61]    61Signal switching:
 This subclass is indented under subclass 55.  Subject matter including specific switching elements or techniques within the information signal circuitry.

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200Electricity: Circuit Makers and Breakers,   appropriate subclasses, for switching devices.
307Electrical Transmission or Interconnection Systems,   subclasses 112+ for class appropriate switching systems.
327Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 365+ for miscellaneous gating circuits.
  
[List of Patents for class 360 subclass 62]    62Record-reproduce:
 This subclass is indented under subclass 61.  Subject matter wherein the switching accomplishes a change between recording and reproducing modes of operation.
  
[List of Patents for class 360 subclass 63]    63Between plural stationary heads:
 This subclass is indented under subclass 61.  Subject matter wherein the switching accomplishes the selection of one or more of a plurality of stationary transducers.
  
[List of Patents for class 360 subclass 64]    64Between heads in alternate engagement with medium:
 This subclass is indented under subclass 61.  Subject matter wherein the switching accomplishes the selection of that transducer which is in engagement with the record carrier from a plurality of transducers which are alternately in engagement with the record carrier.
  
[List of Patents for class 360 subclass 65]    65Specifics of equalizing:
 This subclass is indented under subclass 55.  Subject matter including specific circuitry or techniques for correcting the inherent nonlinear frequency characteristics of magnetic recording or reproducing.

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24,for split signal equalizers.
25,for compensating for record carrier peculiarities.

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333Wave Transmission Lines and Networks,   subclass 28 and the classes indicated in the definition of that subclass for equalizers in general.
  
[List of Patents for class 360 subclass 66]    66Specifics of biasing or erasing:
 This subclass is indented under subclass 55.  Subject matter including specific circuitry or techniques for correcting the inherent nonlinear amplitude characteristics of magnetic recording or for erasing existing recordings.

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25,for modifying information or bias signal to accommodate for record carrier characteristics.

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331Oscillators,   appropriate subclasses, for oscillators usable in biasing or erasing.
  
[List of Patents for class 360 subclass 67]    67Specifics of the amplifier:
 This subclass is indented under subclass 55.  Subject matter including specific circuitry or techniques for amplifying an information signal.

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330Amplifiers,   appropriate subclasses, for amplifiers usable in magnetic recording or reproducing.
  
[List of Patents for class 360 subclass 68]    68Recording amplifier:
 This subclass is indented under subclass 67.  Subject matter wherein the amplification is specifically adapted for recording.
  
[List of Patents for class 360 subclass 69]    69AUTOMATIC CONTROL OF A RECORDER MECHANISM:
 This subclass is indented under the class definition.  Subject matter which, without proximate human intervention, will actively control a recorder or reproducer mechanism.
(1) Note. Apparatus of this and indented subclasses usually require the sensing of a control signal from the record carrier to control the recorder or reproducer mechanism. However, devices responsive to signals emanating from external devices, or devices responsive to control signals which normally accompany or are a part of an information signal to be recorded or reproduced, are also included in this and indented subclasses.
(2) Note. The signal sensed from the record carrier may be a signal which was magnetically recorded thereon or an electrical or mechanical signal generated by mechanically, electrically or optically sensing an attachment to or modification of the record carrier.

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226Advancing Material of Indeterminate Length,   subclasses 10+ , for material- responsive control means.
242Winding, Tensioning, or Guiding,   subclasses 324+ for means for unwinding and rewinding a machine convertible information carrier; e.g., a magnetic tape, particularly subclasses 333+ for automated stop or reversal control for the carrier, subclasses 334+ for a carrier speed or tension control, and subclass 357 for a detector or stop.
318Electricity: Motive Power Systems,   appropriate subclasses, particularly 560+, for automatic motor control devices.
  
[List of Patents for class 360 subclass 70]    70Synchronizing moving-head moving-record recorders:
 This subclass is indented under subclass 69.  Subject matter including controlling the speed or position of movement of a head with respect to a moving record carrier or vice versa.
(1) Note. This subclass includes rotating head pressure shoe servos.
  
[List of Patents for class 360 subclass 71]    71Controlling the record:
 This subclass is indented under subclass 69.  Subject matter including controlling record carrier movement or position with respect to a transducing position.
  
[List of Patents for class 360 subclass 72.1]    72.1Locating specific areas:
 This subclass is indented under subclass 71.  Subject matter wherein the record carrier movement is controlled to bring selected areas of the record into operative position at the recording head to transduce the information recorded thereat.

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13+,for editing magnetic records which may involve locating specific areas.
74.1,for stopping and reversing per se.
  
[List of Patents for class 360 subclass 72.2]    72.2Responsive to recorded address:
 This subclass is indented under subclass 72.1.  Subject matter wherein the record carrier has address signals recorded thereon and these are read to locate the selected area.

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386Motion Video Signal Processing for Recording or Reproducing,   appropriate subclasses for recording television or video signal, particularly subclass 320 for servo control in a video recording and reproduction device.
  
[List of Patents for class 360 subclass 72.3]    72.3Responsive to tape transport:
 This subclass is indented under subclass 72.1.  Subject matter wherein the transport mechanism itself is monitored to control the location of the selected area (e.g., reel or capstan shaft rotation).
  
[List of Patents for class 360 subclass 73.01]    73.01Speed:
 This subclass is indented under subclass 71.  Subject matter which controls the speed of a record carrier past a transducing position.
  
[List of Patents for class 360 subclass 73.02]    73.02Control of relative speed between carriers:
 This subclass is indented under subclass 73.01.  Subject matter which controls the difference in speed between plural record carriers.
  
[List of Patents for class 360 subclass 73.03]    73.03Rotary carrier:
 This subclass is indented under subclass 73.01.  Subject matter including structure to advance the record medium in a circular path past the transducing position.
  
[List of Patents for class 360 subclass 73.04]    73.04Linear carrier:
 This subclass is indented under subclass 73.01.  Subject matter in which the motion of the record carrier is substantially along a single axis.
  
[List of Patents for class 360 subclass 73.05]    73.05Plural speed transport:
 This subclass is indented under subclass 73.04.  Subject matter having structure to provide differing speeds for the record carrier.
  
[List of Patents for class 360 subclass 73.06]    73.06Automatic change between fixed speeds:
 This subclass is indented under subclass 73.05.  Subject matter for changing between two predetermined speeds in the same direction in response to a sensed condition or signal.

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74.1+,for stopping and reversing of a magnetic record carrier.
  
[List of Patents for class 360 subclass 73.07]    73.07Automatic selection of carrier or track speed:
 This subclass is indented under subclass 73.05.  Subject matter for selection of the speed of advance of the carrier in response to a record carrier or track parameter.
  
[List of Patents for class 360 subclass 73.08]    73.08Variable speed:
 This subclass is indented under subclass 73.05.  Subject matter including adjustment or variation of the speed of the record carrier.
  
[List of Patents for class 360 subclass 73.09]    73.09Constant speed:
 This subclass is indented under subclass 73.04.  Subject matter for advancing an elongate record carrier past a transducing position at a constant speed.
  
[List of Patents for class 360 subclass 73.11]    73.11By reproduced control signal and transport derived signal:
 This subclass is indented under subclass 73.09.  Subject matter wherein the speed of the record carrier is controlled by a signal reproduced from the record carrier and a signal sensed by a condition of the carrier advancing mechanism.
  
[List of Patents for class 360 subclass 73.12]    73.12By reproduced control signal:
 This subclass is indented under subclass 73.09.  Subject matter wherein a constant speed record carrier advancing mechanism is controlled by a signal reproduced from the carrier.
  
[List of Patents for class 360 subclass 73.13]    73.13From separate track:
 This subclass is indented under subclass 73.12.  Subject matter wherein the control signal is stored on a track on the record carrier distinct from other information recorded thereon.
  
[List of Patents for class 360 subclass 73.14]    73.14By signal derived from transport:
 This subclass is indented under subclass 73.09.  Subject matter wherein the speed of the record carrier is controlled by a signal sensed by a condition of the carrier advancing mechanism.

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73.11,for record carrier speed control by a signal derived from the record transport combined with a signal reproduced from the record carrier.
  
[List of Patents for class 360 subclass 74.1]    74.1Stopping or reversing:
 This subclass is indented under subclass 71.  Subject matter wherein stopping or reversing of the record carrier"s movement is controlled.
  
[List of Patents for class 360 subclass 74.2]    74.2Responsive to real rotation:
 This subclass is indented under subclass 74.1.  Subject matter where the stopping or reversing is controlled by detecting stoppage of reel rotation.
  
[List of Patents for class 360 subclass 74.3]    74.3Responsive to tape tension:
 This subclass is indented under subclass 74.1.  Subject matter where the stopping or reversing is controlled by detecting a predetermined tape tension.
(1) Note. The subject matter of this subclass includes detecting the absence of tape.
  
[List of Patents for class 360 subclass 74.4]    74.4Responsive to magnetic recorded signals:
 This subclass is indented under subclass 74.1.  Subject matter where signals are magnetically recorded on the record and the stopping or reversing is controlled by detecting these signals.
(1) Note. The subject matter of this subclass includes sensing the absence of the magnetic signals.
(2) Note. The magnetic signals are either the information signals or separate control signals recorded on the record.
  
[List of Patents for class 360 subclass 74.5]    74.5Responsive to physical property of record:
 This subclass is indented under subclass 74.1.  Subject matter where the stopping or reversing is controlled by detecting a physical property of the record (i.e., notch, slot, etc.).
  
[List of Patents for class 360 subclass 74.6]    74.6Photoelectric:
 This subclass is indented under subclass 74.5.  Subject matter where a portion of the record has a light transmitting or reflecting property that differs from the rest of the record and photoelectric means are used to detect such to control the stopping or reversing.
  
[List of Patents for class 360 subclass 74.7]    74.7Conductive:
 This subclass is indented under subclass 74.5.  Subject matter where a portion of the record has an electrical conductivity that differs from the rest of the record and the stopping or reversing is controlled by detecting such.
  
[List of Patents for class 360 subclass 75]    75Controlling the head:
 This subclass is indented under subclass 69.  Subject matter including controlling head position.

SEE OR SEARCH CLASS:

386Motion Video Signal Processing for Recording or Reproducing,   appropriate subclasses for recording television or video signal, particularly subclasses 315 through 321for controlling head position in a video recording and reproduction device.
  
[List of Patents for class 360 subclass 76]    76Azimuth or skew:
 This subclass is indented under subclass 75.  Subject matter wherein the angle between head gap or gaps and record track or tracks is controlled.
  
[List of Patents for class 360 subclass 77.01]    77.01Track centering:
 This subclass is indented under subclass 75.  Subject matter for aligning a transducer head with the midpoint of a continuous information containing path.

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369Dynamic Information Storage or Retrieval,   subclasses 43+ for a transducer tracking servomechanism in a nonmagnetic dynamic recording or reproducing device.
428Stock Material or Miscellaneous Articles,   subclass 845.6 for magnetic storage medium having backcoat layer for servo tracking, with specific physical chemistry or chemical composition; and subclass 848.5 for magnetic storage medium having specified pits, tracks, or indicia with specific physical chemistry or chemical composition.
  
[List of Patents for class 360 subclass 77.02]    77.02Rotary carrier:
 This subclass is indented under subclass 77.01.  Subject matter which controls a transducer centering position relative to a circular revolving medium.
  
[List of Patents for class 360 subclass 77.03]    77.03By nonmagnetic sensing (e.g., optical, capacitive):
 This subclass is indented under subclass 77.02.  Subject matter responsive to a signal produced in response to a property of the record carrier other than a magnetic property, or by a nonmagnetic auxiliary element.
(1) Note. Such an auxiliary element may include a potententiometer, or an optical grating, mechanically coupled to the transducer element.

SEE OR SEARCH CLASS:

369Dynamic Information Storage or Retrieval,   subclass 14 for simultaneous magnetic and nonmagnetic signal reproduction; subclasses 43+ for servo positioning of a nonmagnetic reproduction transducer; subclasses 100+ for signal reproduction from an optical track; and subclass 126 for signal reproduction from a capacitive track.
  
[List of Patents for class 360 subclass 77.04]    77.04By memory storage of repeatable error or correction:
 This subclass is indented under subclass 77.02.  Subject matter including a signal storage device which is used to generate a transducer head position control signal.
  
[List of Patents for class 360 subclass 77.05]    77.05By servo signal component from carrier surface separate from information signal bearing surface:
 This subclass is indented under subclass 77.02.  Subject matter wherein the record carrier includes two surfaces one of which has a continuous path along which an information signal is stored and the other has a continuous path along which at least a component of a transducer head positioning servo control signal is stored.
  
[List of Patents for class 360 subclass 77.06]    77.06Reproduced data signal used for tracking:
 This subclass is indented under subclass 77.02.  Subject matter for processing a reproduced information signal to control the transducer position.
  
[List of Patents for class 360 subclass 77.07]    77.07By tracking signal recorded on or immediately beneath surface:
 This subclass is indented under subclass 77.02.  Subject matter for processing a signal reproduced from the record carrier for controlling transducer head motion and which signal is distinct from a reproduced information signal.
  
[List of Patents for class 360 subclass 77.08]    77.08Distinct servo sector:
 This subclass is indented under subclass 77.07.  Subject matter wherein a transducer head motor control signal is stored in a disk sector distinct from sectors containing information signals.
  
[List of Patents for class 360 subclass 77.11]    77.11Continuous servo signal:
 This subclass is indented under subclass 77.07.  Subject matter wherein the record carrier includes a continuous path along which a transducer positioning servo control signal is stored.
  
[List of Patents for class 360 subclass 77.12]    77.12Elongate web carrier (i.e., tape):
 This subclass is indented under subclass 77.01.  Subject matter wherein the transducer head is aligned with the midpoint of a track on a record carrier the length of which is much greater than its width.
  
[List of Patents for class 360 subclass 77.13]    77.13Transverse scan path:
 This subclass is indented under subclass 77.12.  Subject matter where the resultant motion of the transducer head is at an angle to the forward motion of the record carrier.
  
[List of Patents for class 360 subclass 77.14]    77.14By pilot signal:
 This subclass is indented under subclass 77.13.  Subject matter wherein the centering of the transducer head over the transverse track on the record carrier is controlled by a reference signal recorded on the transverse track.
  
[List of Patents for class 360 subclass 77.15]    77.15Plural pilot signals along single transverse path:
 This subclass is indented under subclass 77.14.  Subject matter wherein multiple reference signals recorded along a transverse track on the record carrier are used to control the motion of the transducer head.
  
[List of Patents for class 360 subclass 77.16]    77.16Having head deflection drive (e.g., piezoelectric bimorph):
 This subclass is indented under subclass 77.13.  Subject matter having an electrostatically actuated device for moving the transducer head.
  
[List of Patents for class 360 subclass 77.17]    77.17Dithering:
 This subclass is indented under subclass 77.16.  Subject matter in which a low amplitude A.C. signal is applied to the transducer head deflection drive.
  
[List of Patents for class 360 subclass 78.01]    78.01Track changing:
 This subclass is indented under subclass 75.  Subject matter having structure to change the path of the head on the record medium from one continuous information containing path to another.
  
[List of Patents for class 360 subclass 78.02]    78.02Tape:
 This subclass is indented under subclass 78.01.  Subject matter wherein the length of the record carrier is much greater than its width.
  
[List of Patents for class 360 subclass 78.03]    78.03Plural tapes:
 This subclass is indented under subclass 78.02.  Subject matter wherein the transducer head changes between tracks on plural magnetic tapes.
  
[List of Patents for class 360 subclass 78.04]    78.04For rotary carrier (e.g., disc):
 This subclass is indented under subclass 78.01.  Subject matter which causes a change in transducing position between tracks on a record carrier moving in circular motion.
  
[List of Patents for class 360 subclass 78.05]    78.05Coarse and fine head drive motors:
 This subclass is indented under subclass 78.04.  Subject matter in which the transducer head is moved over the disk by plural motors having different resolution.
  
[List of Patents for class 360 subclass 78.06]    78.06Specified velocity pattern during access:
 This subclass is indented under subclass 78.04.  Subject matter having a device for moving the transducer head in a particular sequence of velocities to access the desired track.
  
[List of Patents for class 360 subclass 78.07]    78.07Controlled by memory device:
 This subclass is indented under subclass 78.06.  Subject matter having a signal storage device which is used to generate a transducer head velocity control signal.
  
[List of Patents for class 360 subclass 78.08]    78.08Specified spatial pattern during access:
 This subclass is indented under subclass 78.04.  Subject matter wherein the motion of the transducer head between tracks has at least one controlled change in direction.
  
[List of Patents for class 360 subclass 78.09]    78.09Including model of servo system or element:
 This subclass is indented under subclass 78.04.  Subject matter in which the track changing arrangement includes a device which simulates the operation of a servo system which controls the motion of a transducer head, or a component of such a system.
  
[List of Patents for class 360 subclass 78.11]    78.11Including nonmagnetic position sensing:
 This subclass is indented under subclass 78.04.  Subject matter having track changing structure responsive to a signal produced in response to a property of the record carrier other than a magnetic property, or by a nonmagnetic auxiliary element.
(1) Note. Such an auxiliary element may include a potententiometer, or an optical grating, mechanically coupled to the transducer element.

SEE OR SEARCH CLASS:

369Dynamic Information Storage or Retrieval,   subclasses 13.01 through 14for combined magnetic and nonmagnetic (e.g., magneto-optical) signal reproduction, subclasses 30.01-30.99 for track selection in a nonmagnetic reproducing arrangement, subclasses 100-125 for signal reproduction from an optical track, and subclass 126 for signal reproduction from a capacitive track.
  
[List of Patents for class 360 subclass 78.12]    78.12Including particular head actuator:
 This subclass is indented under subclass 78.04.  Subject matter including a detail of a transducer head moving mechanism.
  
[List of Patents for class 360 subclass 78.13]    78.13Stepping motor:
 This subclass is indented under subclass 78.12.  Subject matter wherein the head is moved by an electric motor which produces motion in a series of discrete steps.
  
[List of Patents for class 360 subclass 78.14]    78.14By recorded servo reference or address signal:
 This subclass is indented under subclass 78.04.  Subject matter wherein the head is controlled by a reproduced signal representing the position or address of the transducer head on the record carrier disk.
  
[List of Patents for class 360 subclass 78.15]    78.15Drum:
 This subclass is indented under subclass 78.04.  Subject matter wherein the transducer head moves between tracks on the curved surface of a cylindrical record carrier.
  
[List of Patents for class 360 subclass 79]    79RECORDER CONTROL OF AN EXTERNAL DEVICE:
 This subclass is indented under the class definition.  Subject matter wherein a signal sensed from the record carrier is used to control an external device.
(1) Note. The signal sensed from the record carrier may be a signal which was magnetically recorded thereon or an electrical or mechanical signal generated by mechanically, electrically or optically sensing an attachment to or modification of the record carrier.
(2) Note. A device which is extraneous to the normal function of recorders such as a printer for printing a label on the record from which the control signal is developed, although included within the same housing as the recorder, is considered an external device.

SEE OR SEARCH CLASS:

318Electricity: Motive Power Systems,   subclasses 567+ and classes indicated in the search notes thereunder, for program or pattern controlled devices.
  
[List of Patents for class 360 subclass 80]    80Slide or movie projectors:
 This subclass is indented under subclass 79.  Subject matter wherein the external device is a slide or movie projector.

SEE OR SEARCH CLASS:

352Optics: Motion Pictures,   subclasses 15+ , for this subject matter with significant motion picture structure.
353Optics: Image Projectors,   subclasses 15+ , for this subject matter with significant slide projector structure.
  
[List of Patents for class 360 subclass 81]    81RECORD TRANSPORT WITH HEAD MOVING DURING TRANSDUCING:
 This subclass is indented under the class definition.  Subject matter including a specific mechanism for moving a record carrier past a head which is also moving relative to both record carrier and the mechanism base during the recording or reproducing process.

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101,and 270-274, for moving head mounting means.

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369Dynamic Information Storage or Retrieval,   subclass 97 for storage or retrieval by other than magnetic recording or reproduction with transverse head motion.
  
[List of Patents for class 360 subclass 82]    82Belt record:
 This subclass is indented under subclass 81.  Subject matter wherein the record carrier is in the form of a closed loop.
  
[List of Patents for class 360 subclass 83]    83Tape record:
 This subclass is indented under subclass 81.  Subject matter wherein the record carrier is in the form of an elongated tape.

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226Advancing Material of Indeterminate Length,   appropriate subclasses, for tape drive means.
242Winding, Tensioning, or Guiding,   subclasses 324+ for means for unwinding and rewinding a machine convertible information carrier; e.g., a magnetic tape, particularly subclasses 333+ for automated stop or reversal control for the carrier, subclasses 334+ for a carrier speed or tension control, and subclass 357 for a detector or stop.
  
[List of Patents for class 360 subclass 84]    84Rotating head:
 This subclass is indented under subclass 83.  Subject matter wherein the movement of the head is a rotational movement.
  
[List of Patents for class 360 subclass 85]    85Tape in container:
 This subclass is indented under subclass 84.  Subject matter wherein the record carrier is enclosed in a removable container.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclass 324.2 , 326+, and 335+ for a cartridge storage for a magnet carrier.
  
[List of Patents for class 360 subclass 86]    86Disk record:
 This subclass is indented under subclass 81.  Subject matter wherein the record carrier is in the form of a disk.
  
[List of Patents for class 360 subclass 87]    87Drum record:
 This subclass is indented under subclass 81.  Subject matter wherein the record carrier is in the form of a drum.
  
[List of Patents for class 360 subclass 88]    88RECORD TRANSPORT WITH HEAD STATIONARY DURING TRANSDUCING:
 This subclass is indented under the class definition.  Subject matter including a specific mechanism for moving a record carrier past a head which is stationary during the recording or reproducing process.

SEE OR SEARCH CLASS:

369Dynamic Information Storage or Retrieval,   subclasses 258+ , for nonmagnetic devices of this type.
  
[List of Patents for class 360 subclass 89]    89Wire record:
 This subclass is indented under subclass 88.  Subject matter wherein the record carrier is in the form of a wire.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclasses 324.1+ for a wire-type, magnetic, signal carrier.
  
[List of Patents for class 360 subclass 90]    90Tape record:
 This subclass is indented under subclass 88.  Subject matter wherein the record carrier is in the form of a tape.

SEE OR SEARCH CLASS:

226Advancing Material of Indeterminate Length,   appropriate subclasses for tape drive means.
242Winding, Tensioning, or Guiding,   subclasses 324+ for a device for unwinding and rewinding a machine convertible information carrier; e.g., a magnetic tape or image film.
  
[List of Patents for class 360 subclass 91]    91Plural tapes:
 This subclass is indented under subclass 90.  Subject matter including means for handling a plurality of tapes.

SEE OR SEARCH CLASS:

352Optics: Motion Pictures,   subclass 6 and 123, for multiple motion picture recorders and reproducers.
  
[List of Patents for class 360 subclass 92.1]    92.1Tape in container:
 This subclass is indented under subclass 91.  Subject matter wherein the plural tapes are enclosed in single or plural containers.
  
[List of Patents for class 360 subclass 93]    93Tape in container:
 This subclass is indented under subclass 90.  Subject matter wherein the tape is enclosed in a removable container.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclass 324.2 , 326+, and 335+ for a cartridge storage for an information bearing carrier.
  
[List of Patents for class 360 subclass 94]    94Transport accommodates different types:
 This subclass is indented under subclass 93.  Subject matter including means for accommodating or for adapting the recorder for use with different types of record containers.

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242Winding, Tensioning, or Guiding,   subclass 336 for an adaptive or convertible cartridge or cartridge utilization device adapting a cartridge for a magnetic tape or the like to be used with different components.
  
[List of Patents for class 360 subclass 95]    95With tape extraction:
 This subclass is indented under subclass 93.  Subject matter including means for extracting a portion of the tape from the container.
  
[List of Patents for class 360 subclass 96.1]    96.1Plural reels:
 This subclass is indented under subclass 93.  Subject matter wherein the tape is wound on plural reels within the container.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclasses 335+ , particularly subclasses 341+ for a cartridge containing separate supply and take-up coils.
  
[List of Patents for class 360 subclass 96.2]    96.2With dual capstan drive:
 This subclass is indented under subclass 96.1.  Subject matter including dual capstan drive for moving the tape.
  
[List of Patents for class 360 subclass 96.3]    96.3Reel drive details:
 This subclass is indented under subclass 96.1.  Subject matter including details of the reel drive mechanism.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclass 340 and 349+ for a particular coil drive.
  
[List of Patents for class 360 subclass 96.4]    96.4With common capstan drive:
 This subclass is indented under subclass 96.3.  Subject matter wherein a single motor provides both the reel and capstan drive.
  
[List of Patents for class 360 subclass 96.51]    96.51Container mounting details:
 This subclass is indented under subclass 96.1.  Subject matter includes details of the container mounting mechanism.
(1) Note. This subclass and its indents also include container mounting structure where there is only a nominal recitation of the transport.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclasses 338 through 242and subclass 339 for details of a cartridge mounting.
  
[List of Patents for class 360 subclass 96.61]    96.61With pivotal holder:
 This subclass is indented under subclass 96.51.  Subject matter wherein the container mounting mechanism includes a pivoted container holder that moves in an arc between a container loading position and a transducing position.
  
[List of Patents for class 360 subclass 97.11]    97.11Disk record:
 This subclass is indented under subclass 88.  Subject matter in which the record carrier is a flat circular element.
(1) Note. The mechanism for imparting motion for recording and reproduction is generally in a drive assembly and rotates the disk about the axis of symmetry of the disk.

SEE OR SEARCH CLASS:

341Coded Data Generation or Conversion,   subclass 15 for a digital pattern reading code converter or generator with a movable magnetically coded disk.
  
[List of Patents for class 360 subclass 97.12]    97.12Environmental control:
 This subclass is indented under subclass 97.11.  Subject matter wherein an ambient condition in the enclosure is controlled.
  
[List of Patents for class 360 subclass 97.13]    97.13Airflow:
 This subclass is indented under subclass 97.12.  Subject matter wherein the ambient condition is controlled by an air flow.
  
[List of Patents for class 360 subclass 97.14]    97.14Having shroud:
 This subclass is indented under subclass 97.13.  Subject matter wherein the ambient conditions are controlled by a wall or similar structure surrounding the peripheral wall of the enclosure.
  
[List of Patents for class 360 subclass 97.15]    97.15Having fins:
 This subclass is indented under subclass 97.13.  Subject matter wherein the ambient conditions are controlled by blades positioned within the enclosure; e.g., air stripper.
  
[List of Patents for class 360 subclass 97.16]    97.16With filter:
 This subclass is indented under subclass 97.13.  Subject matter including means to clean or purify the air flow.
  
[List of Patents for class 360 subclass 97.17]    97.17Recirculating filter:
 This subclass is indented under subclass 94.16.  Subject matter wherein the filter cleans or purifies air moving internally within the disk drive enclosure.
  
[List of Patents for class 360 subclass 97.18]    97.18External air filter:
 This subclass is indented under subclass 97.16.  Subject matter wherein the filter cleans air coming from outside the enclosure.
  
[List of Patents for class 360 subclass 97.19]    97.19Vibration or resonance suppression:
 This subclass is indented under subclass 97.12.  Subject matter comprising means for reducing undesired mechanical energy from translating to components within the enclosure.
  
[List of Patents for class 360 subclass 97.2]    97.2Snubber:
 This subclass is indented under subclass 97.12.  Subject matter comprising details of structure that prevents the peripheral edges of the disk to come into contact with a base plate or head/arm assembly during impact or external forces.
  
[List of Patents for class 360 subclass 97.21]    97.21EMI shielding:
 This subclass is indented under subclass 97.12.  Subject matter comprising means for reducing undesired electromagnetic interference from reaching the magnetic disk or head structure.
  
[List of Patents for class 360 subclass 97.22]    97.22Using a fluid:
 This subclass is indented under subclass 97.12.  Subject matter wherein contamination in the enclosure is reduced by means of filling the enclosure with a particular liquid or gas; e.g., helium.
  
[List of Patents for class 360 subclass 98.01]    98.01Plural disks:
 This subclass is indented under subclass 97.11.  Subject matter including structure for concurrent accommodation of multiple disks.
  
[List of Patents for class 360 subclass 98.02]    98.02Axially fixed flexible disks:
 This subclass is indented under subclass 98.01.  Subject matter having structure for holding multiple flexible disks about a common axis.
  
[List of Patents for class 360 subclass 98.03]    98.03With pneumatic partioning of disks:
 This subclass is indented under subclass 98.02.  Subject matter with separation of a stack of flexible disks by use of a flowing stream of air.
  
[List of Patents for class 360 subclass 98.04]    98.04Changer:
 This subclass is indented under subclass 98.01.  Subject matter for selectively moving a disk to the rotating mechanism in the drive.
  
[List of Patents for class 360 subclass 98.05]    98.05Control detail:
 This subclass is indented under subclass 98.04.  Subject matter including a detail of a changer motion controlling mechanism.
  
[List of Patents for class 360 subclass 98.06]    98.06Mechanical detail:
 This subclass is indented under subclass 98.04.  Subject matter including a detail of disk manipulating structure.
  
[List of Patents for class 360 subclass 98.07]    98.07Rotational drive detail:
 This subclass is indented under subclass 98.01.  Subject matter including a structural detail of the disk rotating device in the drive.
  
[List of Patents for class 360 subclass 98.08]    98.08Seating of disks:
 This subclass is indented under subclass 98.01.  Subject matter including a feature for retaining one of the disks in or on a disk rotating device.
  
[List of Patents for class 360 subclass 99.01]    99.01Flexible disk:
 This subclass is indented under subclass 97.11.  Subject matter wherein the disk record carrier is bendable or pliable without permanent change.
  
[List of Patents for class 360 subclass 99.02]    99.02Loading or ejecting mechanism:
 This subclass is indented under subclass 99.01.  Subject matter for moving the disk to or from the drive location where recording or reproduction is performed.
  
[List of Patents for class 360 subclass 99.03]    99.03Motorized:
 This subclass is indented under subclass 99.02.  Subject matter wherein the loading or ejecting mechanism is operated by an electric motor.
  
[List of Patents for class 360 subclass 99.04]    99.04Rotational drive detail:
 This subclass is indented under subclass 99.01.  Subject matter including a structural detail of the disk rotating device in the drive.
  
[List of Patents for class 360 subclass 99.05]    99.05Disk seating:
 This subclass is indented under subclass 99.01.  Subject matter for retaining the flexible disk in or on a disk rotating device.
  
[List of Patents for class 360 subclass 99.06]    99.06Loading or ejecting mechanism:
 This subclass is indented under subclass 97.11.  Subject matter for moving the disk to or from the drive location where recording or reproduction is performed.
  
[List of Patents for class 360 subclass 99.07]    99.07Motorized:
 This subclass is indented under subclass 99.06.  Subject matter wherein the loading or ejecting mechanism is operated by an electric motor.
  
[List of Patents for class 360 subclass 99.08]    99.08Rotational drive detail:
 This subclass is indented under subclass 97.11.  Subject matter including a structural detail of the disk rotating device in the drive.
  
[List of Patents for class 360 subclass 99.09]    99.09Movable drive:
 This subclass is indented under subclass 99.08.  Subject matter for moving the drive to a disk storage location.
  
[List of Patents for class 360 subclass 99.11]    99.11Stationary drive:
 This subclass is indented under subclass 99.08.  Subject matter with structure to move a disk from a storage location to the drive.
  
[List of Patents for class 360 subclass 99.12]    99.12Disk seating:
 This subclass is indented under subclass 97.11.  Subject matter including a feature for retaining the disk in or on a disk rotating device.
  
[List of Patents for class 360 subclass 99.13]    99.13Removable drive cartridge:
 This subclass is indented under subclass 97.11.  Subject matter in which an assembly of at least a disk record and a drive motor are encased in a self-contained enclosure unit that can be removed from an external structure; e.g., a computer housing.
  
[List of Patents for class 360 subclass 99.14]    99.14Removable hard disk cartridge:
 This subclass is indented under subclass 97.11.  Subject matter in which a drive accepts a housed flat circular element that is not bendable or pliable.
  
[List of Patents for class 360 subclass 99.15]    99.15Housing details:
 This subclass is indented under subclass 97.11.  Subject matter comprising details of an enclosure of the moving mechanism or head.
  
[List of Patents for class 360 subclass 99.16]    99.16Base plate:
 This subclass is indented under subclass 99.15.  Subject matter comprising details of a bottom structure of the enclosure.
  
[List of Patents for class 360 subclass 99.17]    99.17Laminated:
 This subclass is indented under subclass 99.16.  Subject matter wherein the bottom structure comprises two or more layers of material in contact.
  
[List of Patents for class 360 subclass 99.18]    99.18Cover:
 This subclass is indented under subclass 99.15.  Subject matter comprising details of a top structure of the enclosure.
  
[List of Patents for class 360 subclass 99.19]    99.19Laminated:
 This subclass is indented under subclass 99.18.  Subject matter wherein the top structure comprises two or more layers of material in contact.
  
[List of Patents for class 360 subclass 99.2]    99.2Having fastening details of housing parts:
 This subclass is indented under subclass 99.15.  Subject matter comprising a structure for connecting elements of the enclosure.
  
[List of Patents for class 360 subclass 99.21]    99.21Sealing:
 This subclass is indented under subclass 99.2.  Subject matter comprising means for reducing undesired external contaminants from entering the enclosure.
  
[List of Patents for class 360 subclass 99.22]    99.22Gasket:
 This subclass is indented under subclass 99.21.  Subject matter wherein the means for reducing undesired external contaminants from entering the enclosure is a mechanical seal that fills the space between two mating surfaces.
  
[List of Patents for class 360 subclass 99.23]    99.23Circuit board:
 This subclass is indented under subclass 99.15.  Subject matter including details of a means for mechanically supporting and electrically connecting electronic components using conductive pathways etched from copper sheets laminated onto a non-conductive substrate in the enclosure.
  
[List of Patents for class 360 subclass 99.24]    99.24Attachment detail:
 This subclass is indented under subclass 99.23.  Subject matter comprising fastening means or other structure to facilitate attachment of the means for supporting and electrically connecting components in the enclosure.
  
[List of Patents for class 360 subclass 99.25]    99.25Electrical interconnector:
 This subclass is indented under subclass 99.23.  Subject matter comprising details of a device to electrically connect the means for supporting and electrically connecting components to other electrical components in the enclosure.
  
[List of Patents for class 360 subclass 100.1]    100.1Drum record:
 This subclass is indented under subclass 88.  Subject matter in which the record carrier is the curved surface of a cylindrical element.
  
[List of Patents for class 360 subclass 101]    101HEAD TRANSPORT WITH RECORD STATIONARY DURING TRANSDUCING:
 This subclass is indented under the class definition.  Subject matter including a specific mechanism for moving a head past a record carrier which is stationary during the recording or reproducing process.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81,for moving-head and moving-record devices.
  
[List of Patents for class 360 subclass 110]    110HEAD:
 This subclass is indented under the class definition.  Subject matter including specific structure of a transducer.

SEE OR SEARCH CLASS:

29Metal Working,   subclass 603 , for methods of manufacturing magnetic transducers.
336Inductor Devices,   appropriate sub- classes, for inductors in general.
428Stock Material or Miscellaneous Articles,   subclasses 810 through 816for magnetic recording component or stock with specified composition or physical chemistry, such as microstructure, or property resulting from microstructure, composition, or chemistry.
  
[List of Patents for class 360 subclass 111]    111Flux gate:
 This subclass is indented under subclass 110.  Subject matter wherein the intensity of the flux emanating from a record is determined by applying a carrier wave to the head and detecting the modulation of that carrier wave caused by the flux.
(1) Note. Excitation circuitry for flux gate heads is included herein.

SEE OR SEARCH CLASS:

324Electricity: Measuring and Testing,   subclasses 253+ , for magnetometers.
  
[List of Patents for class 360 subclass 112]    112Hall effect:
 This subclass is indented under subclass 110.  Subject matter wherein the intensity of the flux emanating from a record is determined by generating an electric field in an element exhibiting the Hall effect and detecting the modulation of the field caused by the flux.

SEE OR SEARCH CLASS:

324Electricity: Measuring and Testing,   subclass 251 , for Hall effect magnetic sensors in general.
365Static Information Storage and Retrieval,   subclass 9 for Hall effect magnetic bubble devices, subclass 170 for static storage systems which use Hall effect devices.
  
[List of Patents for class 360 subclass 114.01]    114.01Read only detector using light for reading magnetically recorded information on tape:
 This subclass is indented under subclass 110.  Subject matter wherein the intensity of the flux emanating from a record in the form of a tape is determined by directing a beam of polarized light at the tape and detecting the rotation of polarization caused by the flux.
  
[List of Patents for class 360 subclass 114.02]    114.02Light beam generator detail:
 This subclass is indented under subclass 114.01.  Subject matter including specifics of a structure generating the light beam.
  
[List of Patents for class 360 subclass 114.03]    114.03Focus detail:
 This subclass is indented under subclass 114.02.  Subject matter including specifics of a structure providing focus of the light beam.
  
[List of Patents for class 360 subclass 114.04]    114.04Beam splitter detail:
 This subclass is indented under subclass 114.01.  Subject matter including specifics of a structure dividing the light beam into multiple parts.
  
[List of Patents for class 360 subclass 114.05]    114.05Readout detector detail:
 This subclass is indented under subclass 114.01.  Subject matter including specifics of a structure receiving the light beam after it interacts with the flux on the tape and analyzes the light beam to determine its rotation.
  
[List of Patents for class 360 subclass 114.06]    114.06Focus detail:
 This subclass is indented under subclass 114.05.  Subject matter including specifics of a structure providing focus of the light beam after it interacts with the flux on the tape.
  
[List of Patents for class 360 subclass 114.07]    114.07Circuit detail:
 This subclass is indented under subclass 114.05.  Subject matter including specifics of the circuit used in analyzing the light beam after it interacts with the flux on the tape.
  
[List of Patents for class 360 subclass 114.08]    114.08Detector material detail:
 This subclass is indented under subclass 114.05.  Subject matter including specifics of the material used for the detector.
  
[List of Patents for class 360 subclass 114.09]    114.09Mounting detail:
 This subclass is indented under subclass 114.05.  Subject matter including specifics of a structure used to attach the detector on the tape recorder.
  
[List of Patents for class 360 subclass 114.1]    114.1Rotary head:
 This subclass is indented under subclass 114.01.  Subject matter wherein the read only detector is utilized in the tape recorder where the heads are moved in a rotary path during transducing.
  
[List of Patents for class 360 subclass 115]    115Flux scanning:
 This subclass is indented under subclass 110.  Subject matter wherein the transducing area of a head is of substantially lesser width than that of the head and the transducing area is caused to move by applying opposing fluxes to different regions of the head.
  
[List of Patents for class 360 subclass 116]    116Cathode ray:
 This subclass is indented under subclass 110.  Subject matter wherein the transducer includes a means of generating a cathode ray and the cathode ray is used to produce, detect or control production or detection of magnetic flux.

SEE OR SEARCH CLASS:

324Electricity: Measuring and Testing,   subclass 250 , for cathode ray magnetic field detectors.
  
[List of Patents for class 360 subclass 117]    117Hand-held:
 This subclass is indented under subclass 110.  Subject matter wherein the transducer is specifically adapted to be held in the hand of the user.
  
[List of Patents for class 360 subclass 118]    118Erase:
 This subclass is indented under subclass 110.  Subject matter wherein the transducer is specifically adapted for use in erasing a magnetic record.

SEE OR SEARCH CLASS:

361Electricity: Electrical Systems and Devices,   subclasses 143+ , 159 and 267 for magnetic record erasers not associated with recorders or reproducers.
  
[List of Patents for class 360 subclass 119.01]    119.01Gap spacer:
 This subclass is indented under subclass 110.  Subject matter including a detail of a nonmagnetic element located between poles of a head to define the transducing area.
  
[List of Patents for class 360 subclass 119.02]    119.02For perpendicular recording head:
 This subclass is indented under subclass 119.01.  Subject matter wherein the transducer is configured to record data in a storage medium by orienting magnetic domains normal to the plane of the storage medium.
(1) Note. Although this definition refers to the plane of a storage medium, it is understood that media may have a nonplanar macroscopic shape.
  
[List of Patents for class 360 subclass 119.03]    119.03Laminated spacer:
 This subclass is indented under subclass 119.02.  Subject matter wherein the gap spacer is made up of a plurality of layers.
  
[List of Patents for class 360 subclass 119.04]    119.04Configuration detail:
 This subclass is indented under subclass 119.02.  Subject matter including a detail of the structural form of the gap spacer.
  
[List of Patents for class 360 subclass 119.05]    119.05For longitudinal thin film recording head:
 This subclass is indented under subclass 119.01.  Subject matter wherein the transducer comprises a plurality of thin layers and is configured to record data in a storage medium by orienting magnetic domains parallel to the plane of the storage medium.
(1) Note. Although this definition refers to the plane of the storage medium, it is understood that media may have a nonplanar macroscopic shape.
  
[List of Patents for class 360 subclass 119.06]    119.06Pancake type:
 This subclass is indented under subclass 119.05.  Subject matter wherein the layers are located in planes parallel to the plane of the storage medium.
  
[List of Patents for class 360 subclass 119.07]    119.07Laminated spacer:
 This subclass is indented under subclass 119.05.  Subject matter wherein the gap spacer is made up of a plurality of layers.
(1) Note. Metal in gap (MIG) can be found in this subclass.
  
[List of Patents for class 360 subclass 119.08]    119.08With thermally conductive material:
 This subclass is indented under subclass 119.07.  Subject matter wherein one of the layers of the spacer is a material which transfers heat.
  
[List of Patents for class 360 subclass 119.09]    119.09With diffusion barrier:
 This subclass is indented under subclass 119.07.  Subject matter wherein one of the layers of the spacer is a layer for preventing particles of spacer material from migrating out of the spacer area and into other layers of the transducer.
  
[List of Patents for class 360 subclass 119.1]    119.1Three or more layers:
 This subclass is indented under subclass 119.07.  Subject matter wherein the number of layers is greater than two.
  
[List of Patents for class 360 subclass 119.11]    119.11Configuration detail:
 This subclass is indented under subclass 119.05.  Subject matter includes a detail of the structural form of the gap spacer.
  
[List of Patents for class 360 subclass 119.12]    119.12Nonuniform width transducing face:
 This subclass is indented under subclass 119.11.  Subject matter wherein the surface of the gap spacer facing the medium has a varying side-to-side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 119.13]    119.13Nonuniform width vertically:
 This subclass is indented under subclass 119.11.  Subject matter wherein a cross section of the gap spacer, in the transverse direction of a recorded track, varies along its extent normal to the storage medium.
  
[List of Patents for class 360 subclass 121]    121Plural gaps:
 This subclass is indented under subclass 110.  Subject matter includes detailed structure of plural gap transducers.
  
[List of Patents for class 360 subclass 122]    122Head surface structure:
 This subclass is indented under subclass 110.  Subject matter wherein the shape, composition or other characteristic of that surface of the head which is proximate the record is specifically described.
  
[List of Patents for class 360 subclass 123.01]    123.01Coil:
 This subclass is indented under subclass 110.  Subject matter including a detail of the position, size, inductance or other feature of the traces used to generate magnetic flux in the head.
(1) Note. The term "trace" in the art is a singular wire or ribbon or strand of conductive material. Typically, multiple traces make up a coil.

SEE OR SEARCH CLASS:

336Inductor Devices,   subclasses 5 through 234for inductor windings.
  
[List of Patents for class 360 subclass 123.02]    123.02For perpendicular recording head:
 This subclass is indented under subclass 123.01.  Subject matter wherein a transducer is configured to record data in a storage medium by orienting magnetic domains normal to the plane of the storage medium.
(1) Note. Although this definition refers to the plane of the storage medium, it is understood that the medium may have a nonplanar macroscopic shape.
  
[List of Patents for class 360 subclass 123.03]    123.03Location:
 This subclass is indented under subclass 123.02.  Subject matter includes a detail of the position of the coil with respect to a specific part of the head structure.
  
[List of Patents for class 360 subclass 123.04]    123.04On return pole:
 This subclass is indented under subclass 123.03.  Subject matter wherein the coil is positioned on or about a flux returning pole of the head structure.
  
[List of Patents for class 360 subclass 123.05]    123.05On main/recording pole:
 This subclass is indented under subclass 123.03.  Subject matter wherein the coil is positioned on or about a flux-emanating pole of the head structure.
  
[List of Patents for class 360 subclass 123.06]    123.06Configuration detail:
 This subclass is indented under subclass 123.02.  Subject matter including a detail of the structural form of the coil.
  
[List of Patents for class 360 subclass 123.07]    123.07Nonuniform trace spacing:
 This subclass is indented under subclass 123.06.  Subject matter including a detail of the spacing between individual traces of the coil, where that spacing is not constant.
  
[List of Patents for class 360 subclass 123.08]    123.08Trace cross section shape:
 This subclass is indented under subclass 123.06.  Subject matter including a detail of the cross-sectional configuration of an individual trace.
  
[List of Patents for class 360 subclass 123.09]    123.09Insulation detail:
 This subclass is indented under subclass 123.02.  Subject matter including a detail of a nonmagnetic, nonelectrically conductive material used to encapsulate and isolate the coil.
  
[List of Patents for class 360 subclass 123.1]    123.1Electrical connection detail:
 This subclass is indented under subclass 123.02.  Subject matter including a detail of a structure that provides a conductive path between the coil and an external device.
  
[List of Patents for class 360 subclass 123.11]    123.11Plural separate coils:
 This subclass is indented under subclass 123.02.  Subject matter wherein the coil is made up of at least two distinct groups of turns of traces.
  
[List of Patents for class 360 subclass 123.12]    123.12Shielding/protection:
 This subclass is indented under subclass 123.02.  Subject matter including a detail of a material or structure which protects or shields the coil, e.g., electrical shielding, corrosion protection.

SEE OR SEARCH CLASS:

320Electricity: Battery or Capacitor Charging or Discharging,   subclasses 100 through 167for detail of magnetic shielding, head insulation, respectively, accompanied with a magnetoresistive (MR) type read head.
  
[List of Patents for class 360 subclass 123.13]    123.13For thin film longitudinal recording head:
 This subclass is indented under subclass 123.01.  Subject matter wherein the transducer comprises a plurality of thin layers and is configured to record data in a storage medium by orienting magnetic domains parallel to the plane of the storage medium.
(1) Note. Although this definition refers to the plane of the storage medium, it is understood that the medium may have a nonplanar macroscopic shape.
  
[List of Patents for class 360 subclass 123.14]    123.14Pancake type:
 This subclass is indented under subclass 123.13.  Subject matter wherein the layers are located in planes parallel to the plane of the medium.
  
[List of Patents for class 360 subclass 123.15]    123.15Plural coil layers:
 This subclass is indented under subclass 123.14.  Subject matter wherein the coil is made up of more than one layer, with each layer positioned in a plane parallel to the plane of the medium.
  
[List of Patents for class 360 subclass 123.16]    123.16Insulation detail:
 This subclass is indented under subclass 123.14.  Subject matter including a detail of the nonmagnetic, nonelectrically conductive material used to encapsulate and isolate the coil.
  
[List of Patents for class 360 subclass 123.17]    123.17Plural separate coils:
 This subclass is indented under subclass 123.13.  Subject matter wherein coil is made up of at least two distinct groups of turns of traces.
  
[List of Patents for class 360 subclass 123.18]    123.18Single plane coil:
 This subclass is indented under subclass 123.13.  Subject matter wherein the coil is made up of plural connected conductive traces located in one plane perpendicular to the plane of the medium.
  
[List of Patents for class 360 subclass 123.19]    123.19Configuration detail:
 This subclass is indented under subclass 123.18.  Subject matter including a detail of the structural form of the winding.
  
[List of Patents for class 360 subclass 123.2]    123.2Trace cross section shape:
 This subclass is indented under subclass 123.19.  Subject matter including a detail of the cross-sectional configuration of an individual trace.
  
[List of Patents for class 360 subclass 123.21]    123.21Trace spacing:
 This subclass is indented under subclass 123.19.  Subject matter including a detail of the spacing between individual traces of the winding.
  
[List of Patents for class 360 subclass 123.22]    123.22Coil spacing from storage medium:
 This subclass is indented under subclass 123.19.  Subject matter including a detail of the spacing of the trace closest to the medium.
  
[List of Patents for class 360 subclass 123.23]    123.23Coil spacing from plane of gap:
 This subclass is indented under subclass 123.19.  Subject matter includes a detail of the spacing from the plane of the coil to a plane of the gap, the spacing being measured in the direction of travel of the medium.
(1) Note. The gap is the transducing gap that allows the flux to pass through during the writing/recording process.
  
[List of Patents for class 360 subclass 123.24]    123.24Seed layer:
 This subclass is indented under subclass 123.18.  Subject matter wherein one or more additional layers are provided to promote disposition or growth of coil material.
  
[List of Patents for class 360 subclass 123.25]    123.25Insulation detail:
 This subclass is indented under subclass 123.18.  Subject matter includes a detail of a nonmagnetic, nonelectrically conductive material used to encapsulate and isolate the coil.
  
[List of Patents for class 360 subclass 123.26]    123.26Zero throat height detail:
 This subclass is indented under subclass 123.25.  Subject matter wherein the detail of the insulation pertains to the point at which the distance between the poles begins to increase.
  
[List of Patents for class 360 subclass 123.27]    123.27Apex angle:
 This subclass is indented under subclass 123.25.  Subject matter includes a detail of the configuration of the nonmagnetic, nonelectrically conductive insulation that defines the slope of a pole adjacent a pole tip region.
(1) Note. A pole tip region is the area closest to the storage medium.
  
[List of Patents for class 360 subclass 123.28]    123.28Plural layers:
 This subclass is indented under subclass 123.25.  Subject matter wherein the nonmagnetic, nonelectrically conductive insulation is made up of more than one layer.
  
[List of Patents for class 360 subclass 123.29]    123.29Diverse materials:
 This subclass is indented under subclass 123.28.  Subject matter wherein at least one of the plural layers is of a material different from that of the other layers.
  
[List of Patents for class 360 subclass 123.3]    123.3Planarizing layer:
 This subclass is indented under subclass 123.28.  Subject matter wherein at least one of the plural insulation layers is provided to form a flat surface.
  
[List of Patents for class 360 subclass 123.31]    123.31Below coil:
 This subclass is indented under subclass 123.28.  Subject matter wherein more than one of the plural insulation layers are positioned below the plane of the coil.
  
[List of Patents for class 360 subclass 123.32]    123.32Above coil:
 This subclass is indented under subclass 123.28.  Subject matter wherein more than one of the plural insulation layers are positioned above the plane of the coil.
  
[List of Patents for class 360 subclass 123.33]    123.33Between traces:
 This subclass is indented under subclass 123.28.  Subject matter wherein more than one of the plural insulation layers are positioned between individual conductive traces of the coil.
  
[List of Patents for class 360 subclass 123.34]    123.34Between coil and medium:
 This subclass is indented under subclass 123.28.  Subject matter wherein more than one of the plural insulation layers are positioned between the medium and the trace closest to the medium.
  
[List of Patents for class 360 subclass 123.35]    123.35Plural diverse layers:
 This subclass is indented under subclass 123.18.  Subject matter wherein each trace of the coil is made up of more than one layer, at least one of which is of a material different from that of the other layers.
  
[List of Patents for class 360 subclass 123.36]    123.36Electrical connection detail:
 This subclass is indented under subclass 123.18.  Subject matter including a specific feature that provides a conductive path between the coil and an external device.
  
[List of Patents for class 360 subclass 123.37]    123.37Shielding/protection:
 This subclass is indented under subclass 123.18.  Subject matter including a detail of a material or structure that protects or shields the coil, e.g., electrical shielding, corrosive protection.

SEE OR SEARCH CLASS:

320Electricity: Battery or Capacitor Charging or Discharging,   subclasses 100 through 167for detail of magnetic shielding, head insulation, respectively, accompanied with a magnetoresistive (MR) type read head.
  
[List of Patents for class 360 subclass 123.38]    123.38Plural plane coil:
 This subclass is indented under subclass 123.13.  Subject matter wherein the coil is made up of plural connected conductive traces located in more than one plane perpendicular to the plane of the storage medium.
  
[List of Patents for class 360 subclass 123.39]    123.39Intercoil layer electrical connection detail:
 This subclass is indented under subclass 123.38.  Subject matter including a specific feature that provides a conductive path between two or more coil segments.
  
[List of Patents for class 360 subclass 123.4]    123.4Configuration detail:
 This subclass is indented under subclass 123.38.  Subject matter including a detail of the structural form of a coil layer.
  
[List of Patents for class 360 subclass 123.41]    123.41Trace cross section shape:
 This subclass is indented under subclass 123.4.  Subject matter including a detail of the cross-sectional configuration of an individual trace.
  
[List of Patents for class 360 subclass 123.42]    123.42Trace spacing:
 This subclass is indented under subclass 123.4.  Subject matter including a detail of the spacing between individual traces of the coil.
  
[List of Patents for class 360 subclass 123.43]    123.43Coil spacing from storage medium:
 This subclass is indented under subclass 123.4.  Subject matter including a detail of the spacing of the trace closest to the medium.
  
[List of Patents for class 360 subclass 123.44]    123.44Coil spacing from plane of gap:
 This subclass is indented under subclass 123.4.  Subject matter including a detail of the spacing from the plane of the coil to the plane of the gap, the spacing being measured in the direction of travel of the medium.
  
[List of Patents for class 360 subclass 123.45]    123.45Seed layer:
 This subclass is indented under subclass 123.38.  Subject matter wherein one or more additional layers are provided to promote disposition or growth of coil material.
  
[List of Patents for class 360 subclass 123.46]    123.46Insulation detail:
 This subclass is indented under subclass 123.38.  Subject matter including a detail of a nonmagnetic, nonelectrically conductive material used to encapsulate and isolate the coil.
  
[List of Patents for class 360 subclass 123.47]    123.47Zero throat height detail:
 This subclass is indented under subclass 123.46.  Subject matter wherein the detail of the insulation pertains to the point at which the distance between the poles begins increase.
  
[List of Patents for class 360 subclass 123.48]    123.48Apex angle:
 This subclass is indented under subclass 123.46.  Subject matter including a detail of the configuration of the nonmagnetic, nonelectrically conductive insulation that defines the slope of a core adjacent the pole tip region.
  
[List of Patents for class 360 subclass 123.49]    123.49Plural layers:
 This subclass is indented under subclass 123.46.  Subject matter wherein the nonmagnetic, nonelectrically conductive insulation is made up of more than one layer.
  
[List of Patents for class 360 subclass 123.5]    123.5Diverse materials:
 This subclass is indented under subclass 123.49.  Subject matter wherein at least one of the plural layers is of a material different from that of other layers.
  
[List of Patents for class 360 subclass 123.51]    123.51Planarizing layer:
 This subclass is indented under subclass 123.49.  Subject matter wherein at least one of the plural layers is provided to form a flat surface.
  
[List of Patents for class 360 subclass 123.52]    123.52Below coil:
 This subclass is indented under subclass 123.49.  Subject matter wherein more than one of the layers are positioned below the plane of the lowermost coil segment.
  
[List of Patents for class 360 subclass 123.53]    123.53Above coil:
 This subclass is indented under subclass 123.49.  Subject matter wherein more than one of the layers are positioned above the plane of the uppermost coil segment.
  
[List of Patents for class 360 subclass 123.54]    123.54Between traces:
 This subclass is indented under subclass 123.49.  Subject matter wherein more than one of the plural layers are positioned between the adjacent segments of the coil.
  
[List of Patents for class 360 subclass 123.55]    123.55Between coil and medium:
 This subclass is indented under subclass 123.49.  Subject matter wherein more than one of the plural layers are positioned between the medium and the traces closest the medium.
  
[List of Patents for class 360 subclass 123.56]    123.56Plural diverse layers:
 This subclass is indented under subclass 123.38.  Subject matter wherein each trace of the coil is made up of more than one layer, at least one of which is of a material different from that of the other layers.
  
[List of Patents for class 360 subclass 123.57]    123.57Electrical connection detail:
 This subclass is indented under subclass 123.38.  Subject matter including a specific feature that provides a conductive path between the coil and an external device.
  
[List of Patents for class 360 subclass 123.58]    123.58Shielding/protection:
 This subclass is indented under subclass 123.38.  Subject matter including a detail of a material or structure that protects or shields one or more of the coil segments, e.g., electrical shielding, corrosion protection.

SEE OR SEARCH CLASS:

320Electricity: Battery or Capacitor Charging or Discharging,   subclasses 100 through 167for detail of magnetic shielding, head insulation, respectively, accompanied with a magnetoresistive (MR) type read head.
  
[List of Patents for class 360 subclass 123.59]    123.59Location:
 This subclass is indented under subclass 123.13.  Subject matter including a detail of the position of the winding with respect to a specific part of the head structure.
  
[List of Patents for class 360 subclass 123.6]    123.6Coil around pole adjacent substrate:
 This subclass is indented under subclass 123.59.  Subject matter wherein the coil is positioned on or about the pole closest to a supporting base layer.
  
[List of Patents for class 360 subclass 123.61]    123.61Coil around pole remote from substrate:
 This subclass is indented under subclass 123.59.  Subject matter wherein the coil is positioned on or about the pole remote from a supporting base layer.
  
[List of Patents for class 360 subclass 125.01]    125.01Core:
 This subclass is indented under subclass 110.  Subject matter comprising a position, size, configuration, or other feature of a magnetic flux conducting element of the head.
  
[List of Patents for class 360 subclass 125.02]    125.02Perpendicular recording head:
 This subclass is indented under subclass 125.01.  Subject matter wherein a transducer is configured to record data in a storage medium by orienting magnetic domains normal to the plane of the storage medium.
  
[List of Patents for class 360 subclass 125.03]    125.03Main/recording pole:
 This subclass is indented under subclass 125.02.  Subject matter including a detail of the magnetic element from which the recording flux projects into the medium.
  
[List of Patents for class 360 subclass 125.04]    125.04Plural poles:
 This subclass is indented under subclass 125.03.  Subject matter wherein the recording pole is made up of a plurality of separate poles.
  
[List of Patents for class 360 subclass 125.05]    125.05Offset from track centerline:
 This subclass is indented under subclass 125.03.  Subject matter wherein the recording pole is asymmetrically located relative to the center of a recorded track in the transverse direction.
  
[List of Patents for class 360 subclass 125.06]    125.06Separate pole tip:
 This subclass is indented under subclass 125.03.  Subject matter wherein the recording pole includes an additional tip element immediately adjacent the medium.
  
[List of Patents for class 360 subclass 125.07]    125.07Junction detail:
 This subclass is indented under subclass 125.06.  Subject matter including a detail of the area where the separate tip element is joined to the recording pole.
  
[List of Patents for class 360 subclass 125.08]    125.08Laminated:
 This subclass is indented under subclass 125.06.  Subject matter wherein the separate tip element is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.09]    125.09Nonuniform width transducing face:
 This subclass is indented under subclass 125.06.  Subject matter wherein the surface of the separate tip element facing the medium has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.1]    125.1Nonuniform width vertically:
 This subclass is indented under subclass 125.06.  Subject matter wherein a cross section of the separate tip element, in the transverse direction of a recorded track, varies along its extent normal to the recorded track.
  
[List of Patents for class 360 subclass 125.11]    125.11Nonuniform thickness vertically:
 This subclass is indented under subclass 125.06.  Subject matter wherein a cross section of the separate tip element, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.12]    125.12Laminated:
 This subclass is indented under subclass 125.03.  Subject matter wherein the recording pole is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.13]    125.13Nonuniform width transducing face:
 This subclass is indented under subclass 125.03.  Subject matter wherein the surface of the recording pole facing the medium has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.14]    125.14Nonuniform width vertically:
 This subclass is indented under subclass 125.03.  Subject matter wherein a cross section of the recording pole, in the transverse direction of a recorded track, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.15]    125.15Nonuniform thickness vertically:
 This subclass is indented under subclass 125.03.  Subject matter wherein a cross section of the recording pole, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.16]    125.16Return pole:
 This subclass is indented under subclass 125.02.  Subject matter including a detail of the magnetic element to which the recording flux returns from the medium.
  
[List of Patents for class 360 subclass 125.17]    125.17Plural poles:
 This subclass is indented under subclass 125.16.  Subject matter wherein the return pole is made up of a plurality of separate poles.
  
[List of Patents for class 360 subclass 125.18]    125.18Offset from track centerline:
 This subclass is indented under subclass 125.16.  Subject matter wherein the return pole is asymmetrically located relative to the center of a recorded track in the transverse direction.
  
[List of Patents for class 360 subclass 125.19]    125.19Nonuniform width transducing face:
 This subclass is indented under subclass 125.16.  Subject matter wherein the surface of the return pole facing the medium has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.2]    125.2Nonuniform width vertically:
 This subclass is indented under subclass 125.16.  Subject matter wherein a cross section of the return pole, in the transverse direction of a recorded track, varies along its extent normal to the recorded track.
  
[List of Patents for class 360 subclass 125.21]    125.21Nonuniform thickness vertically:
 This subclass is indented under subclass 125.16.  Subject matter wherein a cross section of the return pole, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.22]    125.22Separate pole tip:
 This subclass is indented under subclass 125.16.  Subject matter wherein the return pole comprises an additional tip element immediately adjacent the medium which is joined to the return pole.
  
[List of Patents for class 360 subclass 125.23]    125.23Junction detail:
 This subclass is indented under subclass 125.22.  Subject matter including a details of the area where the separate tip element is joined to the return pole.
  
[List of Patents for class 360 subclass 125.24]    125.24Laminated:
 This subclass is indented under subclass 125.22.  Subject matter wherein the separate tip element is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.25]    125.25Configuration detail:
 This subclass is indented under subclass 125.22.  Subject matter including a detail of the structural form of the separate tip element.
  
[List of Patents for class 360 subclass 125.26]    125.26Laminated:
 This subclass is indented under subclass 125.16.  Subject matter wherein the return pole is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.27]    125.27Coupling section:
 This subclass is indented under subclass 125.02.  Subject matter including a detail of an element remote from the storage medium which connects the recording pole to the return pole.
  
[List of Patents for class 360 subclass 125.28]    125.28Laminated:
 This subclass is indented under subclass 125.27.  Subject matter wherein the coupling section is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.29]    125.29Junction detail:
 This subclass is indented under subclass 125.27.  Subject matter including a detail of the area where the coupling section is joined to either the recording pole or return pole.
  
[List of Patents for class 360 subclass 125.3]    125.3Accessory feature:
 This subclass is indented under subclass 125.02.  Subject matter including a detail of an element providing a function other than magnetic flux conduction, e.g., abrasion protection, corrosion protection, electrical shielding, magnetic shielding.
  
[List of Patents for class 360 subclass 125.31]    125.31Heat generating structure:
 This subclass is indented under subclass 125.3.  Subject matter wherein the function involved is the generation of heat.
  
[List of Patents for class 360 subclass 125.32]    125.32Heat transfer structure:
 This subclass is indented under subclass 125.3.  Subject matter wherein the function involved is the removal of heat.
  
[List of Patents for class 360 subclass 125.33]    125.33Thin film longitudinal recording head:
 This subclass is indented under subclass 125.01.  Subject matter wherein a transducer comprises a plurality of thin layers and is configured to record data in a storage medium by orienting magnetic domains parallel to the plane of the storage medium.
  
[List of Patents for class 360 subclass 125.34]    125.34Pancake type:
 This subclass is indented under subclass 125.33.  Subject matter wherein the layers are located in planes parallel to the plane of the medium.
  
[List of Patents for class 360 subclass 125.35]    125.35Core section adjacent medium:
 This subclass is indented under subclass 125.34.  Subject matter including a detail of an element forming the front core section located immediately adjacent and parallel to the plane of the medium.
  
[List of Patents for class 360 subclass 125.36]    125.36Back core section remote from medium:
 This subclass is indented under subclass 125.34.  Subject matter including a detail of an element forming the rear core section remote from and parallel to the plane of the medium.
  
[List of Patents for class 360 subclass 125.37]    125.37Coupling section:
 This subclass is indented under subclass 125.34.  Subject matter including a detail of an element remote from the storage medium which connects the parallel front and rear core sections.
  
[List of Patents for class 360 subclass 125.38]    125.38Substrate:
 This subclass is indented under subclass 125.33.  Subject matter including a detail of a nonmagnetic support for the head.
  
[List of Patents for class 360 subclass 125.39]    125.39Laminated:
 This subclass is indented under subclass 125.38.  Subject matter wherein the substrate is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.4]    125.4Nonuniform thickness vertically:
 This subclass is indented under subclass 125.38.  Subject matter wherein a cross section of the substrate, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.41]    125.41Pole adjacent substrate:
 This subclass is indented under subclass 125.33.  Subject matter including a detail of the magnetic core section immediately adjacent a supporting base layer.
  
[List of Patents for class 360 subclass 125.42]    125.42Zero throat height detail:
 This subclass is indented under subclass 125.41.  Subject matter wherein the detail of the insulation pertains to the point at which the distance between the poles begins increase.
  
[List of Patents for class 360 subclass 125.43]    125.43Separate pole tip:
 This subclass is indented under subclass 125.41.  Subject matter wherein the pole adjacent the substrate includes an additional tip element immediately adjacent the medium.
  
[List of Patents for class 360 subclass 125.44]    125.44Junction detail:
 This subclass is indented under subclass 125.43.  Subject matter including a detail of the area where the separate tip element is joined to the pole adjacent the substrate.
  
[List of Patents for class 360 subclass 125.45]    125.45Laminated:
 This subclass is indented under subclass 125.43.  Subject matter wherein the separate tip element is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.46]    125.46Nonuniform width transducing face:
 This subclass is indented under subclass 125.43.  Subject matter wherein the surface facing the medium of the separate tip element has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.47]    125.47Nonuniform width vertically:
 This subclass is indented under subclass 125.43.  Subject matter wherein a cross section of the separate tip element, in the transverse direction of a recorded track, varies along its extent normal to the recorded track.
  
[List of Patents for class 360 subclass 125.48]    125.48Nonuniform thickness vertically:
 This subclass is indented under subclass 125.43.  Subject matter wherein a cross section of the separate tip element, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.49]    125.49Projecting:
 This subclass is indented under subclass 125.43.  Subject matter where the medium-facing surface of the separate tip element is closer to the medium than the medium-facing surface of the pole it is attached to.
  
[List of Patents for class 360 subclass 125.5]    125.5Laminated:
 This subclass is indented under subclass 125.41.  Subject matter wherein the pole adjacent the substrate is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.51]    125.51Nonuniform width transducing face:
 This subclass is indented under subclass 125.41.  Subject matter wherein the surface facing the medium of the pole adjacent the substrate has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.52]    125.52Nonuniform width vertically:
 This subclass is indented under subclass 125.41.  Subject matter wherein a cross section of the pole adjacent the substrate, in the transverse direction of a recorded track, varies along its extent normal to the recorded track.
  
[List of Patents for class 360 subclass 125.53]    125.53Nonuniform thickness vertically:
 This subclass is indented under subclass 125.41.  Subject matter wherein a cross section of the pole adjacent the substrate, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.54]    125.54Pole remote from substrate:
 This subclass is indented under subclass 125.33.  Subject matter including a detail of the magnetic core section remote from a supporting base layer.
  
[List of Patents for class 360 subclass 125.55]    125.55Zero throat height detail:
 This subclass is indented under subclass 125.54.  Subject matter wherein the detail of the insulation pertains to the point at which the distance between the poles begins increase.
  
[List of Patents for class 360 subclass 125.56]    125.56Separate pole tip:
 This subclass is indented under subclass 125.54.  Subject matter wherein the pole remote from the substrate includes an additional tip element immediately adjacent the medium.
  
[List of Patents for class 360 subclass 125.57]    125.57Junction detail:
 This subclass is indented under subclass 125.56.  Subject matter including a detail of the area where the separate tip element is joined to the pole remote from the substrate.
  
[List of Patents for class 360 subclass 125.58]    125.58Laminated:
 This subclass is indented under subclass 125.56.  Subject matter wherein the separate tip element is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.59]    125.59Nonuniform width transducing face:
 This subclass is indented under subclass 125.56.  Subject matter wherein the surface facing the medium of the separate tip element has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.6]    125.6Nonuniform width vertically:
 This subclass is indented under subclass 125.56.  Subject matter wherein a cross section of the separate tip element, in the transverse direction of a recorded track, varies along its extent normal to the recorded track.
  
[List of Patents for class 360 subclass 125.61]    125.61Nonuniform thickness vertically:
 This subclass is indented under subclass 125.56.  Subject matter wherein a cross section of the separate tip element, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.62]    125.62Projecting:
 This subclass is indented under subclass 125.56.  Subject matter where the medium-facing surface of the separate tip element is closer to the medium than the medium-facing surface of the pole it is attached to.
  
[List of Patents for class 360 subclass 125.63]    125.63Laminated:
 This subclass is indented under subclass 125.54.  Subject matter wherein the pole remote from the substrate is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.64]    125.64Nonuniform width transducing face:
 This subclass is indented under subclass 125.54.  Subject matter wherein the surface facing the medium of the pole remote from the substrate has a varying side to side measurement in the transverse direction of a recorded track.
  
[List of Patents for class 360 subclass 125.65]    125.65Nonuniform width vertically:
 This subclass is indented under subclass 125.54.  Subject matter wherein a cross section of the pole remote from the substrate, in the transverse direction of a recorded track, varies along its extent normal to the recorded track.
  
[List of Patents for class 360 subclass 125.66]    125.66Nonuniform thickness vertically:
 This subclass is indented under subclass 125.54.  Subject matter wherein a cross section of the pole remote from the substrate, in the traveling direction of the medium, varies along its extent normal to the medium.
  
[List of Patents for class 360 subclass 125.67]    125.67Coupling section:
 This subclass is indented under subclass 125.33.  Subject matter including a detail of an element remote from the medium which connects the pole adjacent the substrate to the pole remote from the substrate.
  
[List of Patents for class 360 subclass 125.68]    125.68Junction detail:
 This subclass is indented under subclass 125.67.  Subject matter including a detail of the area where the coupling section is joined to either the pole adjacent the substrate or the pole remote from the substrate.
  
[List of Patents for class 360 subclass 125.69]    125.69Laminated:
 This subclass is indented under subclass 125.67.  Subject matter wherein the coupling section is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.7]    125.7Nonuniform cross section:
 This subclass is indented under subclass 125.67.  Subject matter wherein the coupling section has a nonconstant cross-sectional configuration.
  
[List of Patents for class 360 subclass 125.71]    125.71Accessory feature:
 This subclass is indented under subclass 125.33.  Subject matter including a detail of an element providing a function other than magnetic flux conduction.
  
[List of Patents for class 360 subclass 125.72]    125.72Protective structure:
 This subclass is indented under subclass 125.71.  Subject matter wherein the function is protection, e.g., abrasion protection, corrosion protection, electrical shielding, magnetic shielding.
  
[List of Patents for class 360 subclass 125.73]    125.73Laminated:
 This subclass is indented under subclass 125.72.  Subject matter wherein the protective structure is made up of more than one layer.
  
[List of Patents for class 360 subclass 125.74]    125.74Heat generating structure:
 This subclass is indented under subclass 125.71.  Subject matter wherein the function involved is the generation of heat.
  
[List of Patents for class 360 subclass 125.75]    125.75Heat transfer structure:
 This subclass is indented under subclass 125.71.  Subject matter wherein the function involved is the removal of heat.
  
[List of Patents for class 360 subclass 128]    128Head accessory:
 This subclass is indented under subclass 110.  Subject matter wherein an element which is intimately associated with the head or its surroundings is described in detail.
  
[List of Patents for class 360 subclass 129]    129Housing:
 This subclass is indented under subclass 128.  Subject matter including detailed structure or characteristics of the head housing.
  
[List of Patents for class 360 subclass 130.1]    130.1Record separator:
 This subclass is indented under subclass 128.  Subject matter where the record transducing relationship with the head is normally recited and the element selectively moves the record out of the transducing position.
  
[List of Patents for class 360 subclass 130.2]    130.2Record guide:
 This subclass is indented under subclass 128.  Subject matter where the element aligns and/or supports the record in its transducing position with respect to the head.
(1) Note. The element must be directly associated with the head.
(2) Note. This subclass is limited to details of the record guide element with no more than a nominal recitation of the transport; detailed recitations of the transport system must be classified or searched in the appropriate transport subclass.
  
[List of Patents for class 360 subclass 130.21]    130.21Tape record:
 Subject matter under 130.2 where the record involved is a tape.
  
[List of Patents for class 360 subclass 130.22]    130.22Rotating head:
 This subclass is indented under subclass 130.21.  Subject matter where the head rotates during transducing.
  
[List of Patents for class 360 subclass 130.23]    130.23Helical scan:
 This subclass is indented under subclass 130.22.  Subject matter where the head rotation involves a helical scan of the record
  
[List of Patents for class 360 subclass 130.24]    130.24Head drum details:
 This subclass is indented under subclass 130.23.  Subject matter where the guide element is mounted on or a part of the head drum.
  
[List of Patents for class 360 subclass 130.3]    130.3Pressure element:
 This subclass is indented under subclass 128.  Subject matter where the element biases the record into transducing relationship with the head.
  
[List of Patents for class 360 subclass 130.31]    130.31Tape record:
 This subclass is indented under subclass 130.3.  Subject matter where the record involved is a tape.
  
[List of Patents for class 360 subclass 130.32]    130.32Element mounting details:
 This subclass is indented under subclass 130.31.  Subject matter including details of the mounting structure for the pressure element.
  
[List of Patents for class 360 subclass 130.33]    130.33Element in tape container:
 This subclass is indented under subclass 130.31.  Subject matter where the tape is housed in a removable container and the pressure element is also mounted in the container.

SEE OR SEARCH CLASS:

242Winding, Tensioning, or Guiding,   subclass 324.2 , 326+, and 335+ for a coil on or within a cartridge.
  
[List of Patents for class 360 subclass 130.34]    130.34Disc record:
 This subclass is indented under subclass 130.3.  Subject matter where the record involved is a disc.
  
[List of Patents for class 360 subclass 131]    131RECORD MEDIUM:
 This subclass is indented under the class definition.  Subject matter including specific structure of a record carrier.
(1) Note. Magnetic records which are defined only by their composition are not classified in this subclass. Magnetic records which include no more structure than a base having one or more coatings thereon are also excluded from this subclass. Merely naming the record as a wire, filament, rod, ribbon, strand, or record will not be sufficient to classify the patent in Class 360. For magnetic records and analogous articles which are defined only by their composition or which include no more structure than a base having one or more coatings thereon see Classes below.

SEE OR SEARCH CLASS:

106Compositions: Coating or Plastic,   for strands, filaments and records distinguished solely by being made of plastic compositions.
148Metal Treatment,   subclasses 400+ for metallic stock or strands which are the product of a Class 148 process, particularly indented subclasses 300+ drawn to magnetic products of a Class 148 process.
206Special Receptacle or Package,   subclasses 307+ for a container under the class definition for removably containing an article which includes machine readable information registered thereon.
235Registers,   subclass 493 for a record containing discrete bits of magnetic material, said bits being coded markings on a record.
252Compositions,   subclasses 62.51+ for compositions specialized and designed for use as magnetic materials, substances peculiar to such compositions or processes of making compositions or substances.
346Recorders,   subclasses 134+ for non magnetic records.
352Optics: Motion Picture,   subclasses 1+ for sound recording, including magnetic sound records, combined with motion picture structure.
420Alloys or Metallic Compositions,   appropriate subclasses for alloy stock or strands which are claimed broadly as "magnetic", or "magnetized" or "permanent magnet" or are defined only in terms of their composition but are inherently magnetic and for metallic stock or strands composed of a single metal.
428Stock Material or Miscellaneous Articles,   subclasses 800 through 848.9for magnetic recording component or stock distinguished by composition or physical chemistry (e.g., materials, microstructure, surface property, etc.), usable as magnetic record carrier or component; subclasses 817-825.1 for media or magnetizable material free of polymeric binder; subclasses 826-837 for magneto-optical stock material; subclasses 838-845.7 for media wherein the magnetizable material is in particulate form dispersed in a binder; and subclasses 846-848.9 for media substrates.
  
[List of Patents for class 360 subclass 132]    132In container:
 This subclass is indented under subclass 131.  Subject matter wherein the record carrier is distinguished by the container in which it is housed.
  
[List of Patents for class 360 subclass 133]    133For disk:
 This subclass is indented under subclass 132.  Subject matter wherein the record is in the form of a disk.

SEE OR SEARCH CLASS:

428Stock Material or Miscellaneous Articles,   subclass 848.7 for stock articles distinguished by composition or physical chemistry, usable as magnetic record carriers in the form of the disk within enclosure.
  
[List of Patents for class 360 subclass 134]    134Tape:
 This subclass is indented under subclass 131.  Subject matter wherein the record is in the form of a tape.
  
[List of Patents for class 360 subclass 135]    135Disk:
 This subclass is indented under subclass 131.  Subject matter wherein the record is in the form of a disk.
  
[List of Patents for class 360 subclass 136]    136Drum:
 This subclass is indented under subclass 131.  Subject matter wherein the record is in the form of a drum.
  
[List of Patents for class 360 subclass 137]    137MISCELLANEOUS:
 This subclass is indented under the class definition.  Subject matter not provided for above.
  
[List of Patents for class 360 subclass 220]    220FLUID BEARING RECORD SUPPORT:
 This subclass is indented under the class definition.  Subject matter wherein a fluid bearing is utilized to support and space a medium away from a head.

SEE OR SEARCH THIS CLASS, SUBCLASS:

230through 237.1, for fluid bearing head support.
  
[List of Patents for class 360 subclass 221]    221Tape record:
 This subclass is indented under subclass 220.  Subject matter wherein the medium is in the form of an elongated ribbon.

SEE OR SEARCH THIS CLASS, SUBCLASS:

231,for fluid bearing head support for a tape record.
  
[List of Patents for class 360 subclass 221.1]    221.1Liquid bearing:
 This subclass is indented under subclass 221.  Subject matter wherein the fluid bearing is a liquid bearing.
  
[List of Patents for class 360 subclass 224]    224Disk record:
 This subclass is indented under subclass 220.  Subject matter wherein the medium is a circular element adapted for rotation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

234through 237.1, for fluid bearing head support for a disk record.
  
[List of Patents for class 360 subclass 230]    230FLUID BEARING HEAD SUPPORT:
 This subclass is indented under the class definition.  Subject matter wherein a fluid bearing is utilized to support and space a head away from a medium.

SEE OR SEARCH THIS CLASS, SUBCLASS:

220through 224, for fluid bearing record support.
  
[List of Patents for class 360 subclass 231]    231Tape record:
 This subclass is indented under subclass 230.  Subject matter wherein the medium is in the form of an elongated ribbon.

SEE OR SEARCH THIS CLASS, SUBCLASS:

221through 221.1, for fluid bearing record support of a tape record.
  
[List of Patents for class 360 subclass 234]    234Disk record:
 This subclass is indented under subclass 230.  Subject matter wherein the medium is a circular element adapted for rotation.

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224,for fluid bearing record support of a disk record.
  
[List of Patents for class 360 subclass 234.1]    234.1Liquid bearing:
 This subclass is indented under subclass 234.  Subject matter wherein the fluid bearing is a liquid bearing.
  
[List of Patents for class 360 subclass 234.2]    234.2Flexible disk:
 This subclass is indented under subclass 234.  Subject matter wherein the disk is pliable.
  
[List of Patents for class 360 subclass 234.3]    234.3Air bearing slider detail:
 This subclass is indented under subclass 234.  Subject matter including specifics of an element which mounts a head and which has a configuration involved in the generation of an air bearing.
(1) Note. Air bearing sliders for fluid bearing head support include a body having protrusions therefrom (rails) which assist in generating an air bearing.
(2) Note. The term "air bearing" in the art includes any gaseous bearing.

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246.2,for a full contact slider.
  
[List of Patents for class 360 subclass 234.4]    234.4IC/circuit component on slider:
 This subclass is indented under subclass 234.3.  Subject matter wherein an integrated circuit or discrete electrical component is mounted on the slider.
  
[List of Patents for class 360 subclass 234.5]    234.5Electrical attachment of slider/head:
 This subclass is indented under subclass 234.3.  Subject matter including structure making electrical connection to the slider, to a head on the slider or between the slider and a head.

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245.8through 246 for electrical connection detail in general for disk record head mounting, subclass 264.2 for electrical connection detail onto actuator arm for shifting head in an arcuate path between tracks on a disk record, subclass 266.3 for electrical connection detail onto an actuator arm for shifting head in a linear path between tracks on a disk record, subclass 271.9 for electrical connection detail at a stationary drum in rotary head transducing on a tape record, and subclass
281.7,for electrical connection between head and a rotary part of transformer in signal transfer to/from head in rotary head transducing on tape record.

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439Electrical Connectors,   appropriate subclasses for details of an electrical connector, per se.
  
[List of Patents for class 360 subclass 234.6]    234.6Mechanical attachment of slider to its support:
 This subclass is indented under subclass 234.3.  Subject matter including the physical connection of the slider to the element supporting it.
  
[List of Patents for class 360 subclass 234.7]    234.7Head attachment to slider:
 This subclass is indented under subclass 234.3.  Subject matter involving particulars of the physical joining of a head to a slider.
(1) Note. This may involve such things as adhesive details, particularly configured recesses in a slider to accommodate a particular head, etc.
  
[List of Patents for class 360 subclass 234.8]    234.8On/in side of slider:
 This subclass is indented under subclass 234.7.  Subject matter wherein a head is attached on or embedded in the side surfaces of a slider.
  
[List of Patents for class 360 subclass 234.9]    234.9In slot of rail:
 This subclass is indented under subclass 234.7.  Subject matter wherein a head is mounted in a groove within the rail.
  
[List of Patents for class 360 subclass 235]    235Signal winding mount/access detail:
 This subclass is indented under subclass 234.7.  Subject matter including specifics of the mounting of or access to a signal winding.
  
[List of Patents for class 360 subclass 235.1]    235.1Slider material:
 This subclass is indented under subclass 234.3.  Subject matter wherein a particular material is specified for a slider or a part thereof.
(1) Note. Included in this subclass is the material of a coating on the entire slider assembly, for example.
  
[List of Patents for class 360 subclass 235.2]    235.2Rail material:
 This subclass is indented under subclass 235.1.  Subject matter which specifies a particular material used for a slider rail.
  
[List of Patents for class 360 subclass 235.3]    235.3Body material:
 This subclass is indented under subclass 235.1.  Subject matter which specifies a particular material used for the body of a slider.
  
[List of Patents for class 360 subclass 235.4]    235.4Air bearing surface detail:
 This subclass is indented under subclass 234.3.  Subject matter including specifics of the configuration of a disk confronting slider that generates an air bearing.
(1) Note. The term "air bearing" in the art includes any gaseous bearing.
(2) Note. Generation of the air bearing often utilizes protrusions from the body of the slider termed "rails".
  
[List of Patents for class 360 subclass 235.5]    235.5Negative pressure type:
 This subclass is indented under subclass 235.4.  Subject matter wherein the slider in part uses subambient pressure.
  
[List of Patents for class 360 subclass 235.6]    235.6Leading end detail:
 This subclass is indented under subclass 235.5.  Subject matter including specifics of the slider leading end.
(1) Note. Airflow enters a slider s leading end in the direction of the trailing end where it exits.

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236.4,for fluid bearing head support on a disk record including a detail of the leading end of an air bearing slider, in general.
  
[List of Patents for class 360 subclass 235.7]    235.7Trailing end detail:
 This subclass is indented under subclass 235.5.  Subject matter including specifics of the slider trailing end.
(1) Note. Airflow enters a slider s leading end in the direction of the trailing end where it exits.

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236.5,for fluid bearing head support on a disk record including a detail of the trailing end of an air bearing slider, in general.
  
[List of Patents for class 360 subclass 235.8]    235.8Rail surface detail:
 This subclass is indented under subclass 235.5.  Subject matter including the specifics of the exterior surface of a rail facing the medium.
(1) Note. This may include, for example, such things as rail surface texture.

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236.6,for fluid bearing head support on a disk record including a detail of a rail surface of an air bearing slider, in general.
  
[List of Patents for class 360 subclass 235.9]    235.9Rail side edge detail:
 This subclass is indented under subclass 235.5.  Subject matter including specifics of the side boundaries of the rail.

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236.7,for fluid bearing head support on a disk record including a detail of a rail side edge of an air bearing slider, in general.
  
[List of Patents for class 360 subclass 236]    236Cross rail detail:
 This subclass is indented under subclass 235.5.  Subject matter including specifics of a rail that is substantially transverse to airflow.
  
[List of Patents for class 360 subclass 236.1]    236.1Varying width rail:
 This subclass is indented under subclass 235.5.  Subject matter wherein a negative pressure type air bearing is produced by a slider having at least one rail whose width differs along its length.

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236.8,for fluid bearing head support on a disk record including a variable width rail of an air bearing slider, in general.
  
[List of Patents for class 360 subclass 236.2]    236.2Asymmetrical rail arrangement:
 This subclass is indented under subclass 235.5.  Subject matter wherein a negative pressure type air bearing is produced by a configuration of multiple rails which is not symmetrical.

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236.9,for fluid bearing head support on a disk record including an asymmetrical rail arrangement of an air bearing slider, in general.
  
[List of Patents for class 360 subclass 236.3]    236.3Three or more rails/pads:
 This subclass is indented under subclass 235.5.  Subject matter wherein at least three rails (or pads) are utilized in producing the negative pressure type air bearing.

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237,for fluid bearing head support on a disk record including three or more rails/pads on an air bearing slider, in general.
  
[List of Patents for class 360 subclass 236.4]    236.4Leading end detail:
 This subclass is indented under subclass 235.4.  Subject matter including specifics of the slider leading end.
(1) Note. Airflow enters a slider s leading end in the direction of the trailing end where it exits.

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235.6,for fluid bearing head support on a disk record including a detail of the leading end of a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 236.5]    236.5Trailing end detail:
 This subclass is indented under subclass 235.4.  Subject matter including specifics of a slider trailing end.
(1) Note. Airflow enters a slider s leading end in the direction of the trailing end where it exits.

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235.7,for fluid bearing head support on a disk record including a detail of the trailing end of a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 236.6]    236.6Rail surface detail:
 This subclass is indented under subclass 235.4.  Subject matter including specifics of the exterior surface of a rail facing the medium.
(1) Note. This may include, for example, such things as rail surface texture.

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235.8,for fluid bearing head support on a disk record including a detail of a rail surface of a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 236.7]    236.7Rail side edge detail:
 This subclass is indented under subclass 235.4.  Subject matter including specifics of the side boundaries of the rail.

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235.9,for fluid bearing head support on a disk record including a detail of a rail side surface of a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 236.8]    236.8Varying width rail:
 This subclass is indented under subclass 235.4.  Subject matter wherein the width of a given rail differs along its length.

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236.1,for fluid bearing head support on a disk record including a variable width rail of a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 236.9]    236.9Asymmetrical rail arrangement:
 This subclass is indented under subclass 235.4.  Subject matter wherein the configuration of multiple rails is not symmetrical.

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236.2,for fluid bearing head support on a disk record including an asymmetrical rail arrangement of a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 237]    237Three or more rails/pads:
 This subclass is indented under subclass 235.4.  Subject matter wherein at least three rails (or pads) produce the air bearing.

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236.3,for fluid bearing head support on a disk record including three or more rails/pads on a negative pressure type air bearing slider.
  
[List of Patents for class 360 subclass 237.1]    237.1Partial contact:
 This subclass is indented under subclass 235.4.  Subject matter including some specified degree of contact but less than full contact between slider and disk.

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246.1through 246.5, for head mounting for disk record having full contact suspension.
  
[List of Patents for class 360 subclass 240]    240HEAD MOUNTING:
 This subclass is indented under the class definition.  Subject matter including a specific mechanical structure for holding a head in a position with respect to a record medium.
  
[List of Patents for class 360 subclass 241]    241Tape record:
 This subclass is indented under subclass 240.  Subject matter wherein the medium is in the form of an elongated ribbon.
  
[List of Patents for class 360 subclass 241.1]    241.1Plural head mounting on only one tape side:
 This subclass is indented under subclass 241.  Subject matter including multiple heads located on only a single tape side.
  
[List of Patents for class 360 subclass 241.2]    241.2Plural head mounting on opposite tape sides:
 This subclass is indented under subclass 241.  Subject matter including multiple heads located on both tape sides.
  
[List of Patents for class 360 subclass 241.3]    241.3Head urging detail:
 This subclass is indented under subclass 241.  Subject matter including specifics of some structure that biases a head into contact with the tape.
  
[List of Patents for class 360 subclass 244]    244Disk record:
 This subclass is indented under subclass 240.  Subject matter wherein the medium is a circular element adapted for rotation.
  
[List of Patents for class 360 subclass 244.1]    244.1IC/circuit component on suspension element:
 This subclass is indented under subclass 244.  Subject matter wherein an integrated circuit or discrete electrical component is mounted on a suspension element.
  
[List of Patents for class 360 subclass 244.2]    244.2Load beam detail:
 This subclass is indented under subclass 244.  Subject matter including specifics of a load beam i.e., a structure attached to an actuator arm to which a head/slider is mounted.
(1) Note. An actuator arm provides motion to a load beam.

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245.5,for details of a gimbal which is integral with a load beam.
  
[List of Patents for class 360 subclass 244.3]    244.3Laminated beam:
 This subclass is indented under subclass 244.2.  Subject matter wherein the load beam is formed of plural layers.
  
[List of Patents for class 360 subclass 244.4]    244.4Nonmetallic beam:
 This subclass is indented under subclass 244.2.  Subject matter wherein the load beam is formed from material other than metal.
  
[List of Patents for class 360 subclass 244.5]    244.5Actuator mount region detail:
 This subclass is indented under subclass 244.2.  Subject matter including detail of the portion of the load beam that is attached to the actuator arm.
  
[List of Patents for class 360 subclass 244.6]    244.6Ball staking:
 This subclass is indented under subclass 244.5.  Subject matter wherein the load beam is attached to an actuator arm by swaging.
(1) Note. Ball staking and swaging are equivalent terms.
  
[List of Patents for class 360 subclass 244.7]    244.7Adhesive:
 This subclass is indented under subclass 244.5.  Subject matter wherein the load beam is attached to the actuator arm by an adhesive.
  
[List of Patents for class 360 subclass 244.8]    244.8Spring region detail:
 This subclass is indented under subclass 244.2.  Subject matter including specifics of the portion of a load beam which allows some degree of flexing and which is located between the actuator mount area and a rigid intermediate section.
  
[List of Patents for class 360 subclass 244.9]    244.9Rigid intermediate section detail:
 This subclass is indented under subclass 244.2.  Subject matter including specifics of the portion of the load beam designed to be substantially inflexible which is located between a spring region and a gimbal mounting region.
  
[List of Patents for class 360 subclass 245]    245Gimbal mounting region detail:
 This subclass is indented under subclass 244.2.  Subject matter including specifics of the portion of a load beam which provides for the attachment of a gimbal.
  
[List of Patents for class 360 subclass 245.1]    245.1Pivot/load button detail:
 This subclass is indented under subclass 245.  Subject matter including specifics of an element which allows the rotation of a gimbal.
  
[List of Patents for class 360 subclass 245.2]    245.2Assembly feature:
 This subclass is indented under subclass 244.2.  Subject matter including some physical structure related to the assembly of a load beam.
  
[List of Patents for class 360 subclass 245.3]    245.3Gimbal detail:
 This subclass is indented under subclass 244.  Subject matter including specifics of a structure that maintains the head parallel to the medium.
(1) Note. Excluded herein are gimbal details of a full contact suspension that are classified elsewhere.

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246.4,for a gimbal detail of a full contact suspension.
  
[List of Patents for class 360 subclass 245.4]    245.4Attachment detail:
 This subclass is indented under subclass 245.3.  Subject matter including specifics of the mechanical connection between a gimbal and the suspension member that physically supports it.
  
[List of Patents for class 360 subclass 245.5]    245.5Integral with load beam:
 This subclass is indented under subclass 245.3.  Subject matter wherein the gimbal is a constituent part of a load beam.

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244.2,245.2, for generic load beam detail.
  
[List of Patents for class 360 subclass 245.6]    245.6Plural axis components:
 This subclass is indented under subclass 245.3.  Subject matter wherein the gimbal may pivot about multiple axes.
  
[List of Patents for class 360 subclass 245.7]    245.7Motion limiter detail:
 This subclass is indented under subclass 245.3.  Subject matter wherein specifics of a structure is provided to restrain the motion of a gimbal to some degree.
  
[List of Patents for class 360 subclass 245.8]    245.8Electrical connection detail:
 This subclass is indented under subclass 244.  Subject matter including specifics of electrical attachment in the head mounting for a disk record.

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234.5,for electrical attachment of slider/head in fluid bearing head support, subclass 264.2 for electrical connection detail onto an actuator arm for shifting head in an arcuate path between tracks on a disk record, subclass 266.3 for electrical connection detail onto an actuator arm for shifting head in a linear path between tracks on a disk record, subclass 271.9 for electrical connection detail at a stationary drum in rotary head transducing on a tape record, and subclass 281.7 for electrical connection between head and a rotary part of transformer in signal transfer to/from head in rotary head transducing on tape record.

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439Electrical Connectors,   appropriate subclasses for details of an electrical connector, per se.
  
[List of Patents for class 360 subclass 245.9]    245.9Flexible printed circuit type:
 This subclass is indented under subclass 245.8.  Subject matter wherein the electrical connection includes a pliable printed circuit element.
  
[List of Patents for class 360 subclass 246]    246Noise reduction:
 This subclass is indented under subclass 245.8.  Subject matter wherein the electrical connection provides electrical noise diminishing.
  
[List of Patents for class 360 subclass 246.1]    246.1Full contact suspension:
 This subclass is indented under subclass 244.  Subject matter wherein a head is in direct physical contact with the disk record.

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237.1,for fluid bearing head support having partial contact between a disk record and slider.
  
[List of Patents for class 360 subclass 246.2]    246.2Slider detail:
 This subclass is indented under subclass 246.1.  Subject matter including specifics of an element which directly mounts a head for full contact with the disk record.

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234.3through 237.1, for a floating slider in a fluid bearing head support.
  
[List of Patents for class 360 subclass 246.3]    246.3Pivot detail:
 This subclass is indented under subclass 246.1.  Subject matter including specifics of the structure about which a head, gimbal or mounting arm rotate.
  
[List of Patents for class 360 subclass 246.4]    246.4Gimbal detail:
 This subclass is indented under subclass 246.1.  Subject matter including specifics of an element providing proper orientation of a head relative to a disk record.

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245.3through 245.7, for a disk record gimbal detail, in general.
  
[List of Patents for class 360 subclass 246.5]    246.5Single head:
 This subclass is indented under subclass 246.1.  Subject matter wherein only one head is provided.
  
[List of Patents for class 360 subclass 246.6]    246.6Plural heads for each disk side:
 This subclass is indented under subclass 244.  Subject matter including multiple heads on each disk side.
  
[List of Patents for class 360 subclass 246.7]    246.7Plural actuators:
 This subclass is indented under subclass 246.6.  Subject matter having multiple drivers (i.e., actuators).
  
[List of Patents for class 360 subclass 246.8]    246.8Offset heads on opposite sides of disk:
 This subclass is indented under subclass 244.  Subject matter including heads which are not directly opposite each other on the opposite sides of a disk.
  
[List of Patents for class 360 subclass 250]    250For moving head into/out of transducing position:
 This subclass is indented under subclass 240.  Subject matter wherein selective movement of the head to or from a position other than a transducing position relative to a medium is provided.
  
[List of Patents for class 360 subclass 251]    251Tape record having arcuate head retraction movement:
 This subclass is indented under subclass 250.  Subject matter wherein the head is moved in a curved path between transducing and nontransducing positions relative to a tape.
  
[List of Patents for class 360 subclass 251.1]    251.1Tape record having linear head retraction movement:
 This subclass is indented under subclass 250.  Subject matter wherein the head is moved in a straight line between transducing and nontransducing positions relative to a tape.
  
[List of Patents for class 360 subclass 251.2]    251.2Driven by tape driver:
 This subclass is indented under subclass 251.1.  Subject matter wherein the drive for the head movement is provided in part by a driver for a tape transport system.
  
[List of Patents for class 360 subclass 251.3]    251.3Cam type:
 This subclass is indented under subclass 251.1.  Subject matter wherein a cam element provides the linear head retraction movement.

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261.2,for head mounting for shifting head between tracks on tape record which includes linear movement by cam.
  
[List of Patents for class 360 subclass 251.4]    251.4Solenoid type:
 This subclass is indented under subclass 251.1.  Subject matter wherein the linear head retraction is provided by a device which is driven by an energizing electromagnet that causes movement of an associated mechanical part.
  
[List of Patents for class 360 subclass 251.5]    251.5Rotary head type:
 This subclass is indented under subclass 251.1.  Subject matter including a head of the type that is rotated during transducing.

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271,for a tape record having rotary head during transducing, and 291.4 for head mounting allowing for minor repositioning of rotary head in transducing position on a tape record.
  
[List of Patents for class 360 subclass 254]    254Disk record:
 This subclass is indented under subclass 250.  Subject matter wherein the medium is a circular element adapted for rotation.

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244through 246.8, for head mounting for disk record, in general.
  
[List of Patents for class 360 subclass 254.1]    254.1Flexible disk:
 This subclass is indented under subclass 254.  Subject matter wherein the disk is pliable.
  
[List of Patents for class 360 subclass 254.2]    254.2Arcuate track change type:
 This subclass is indented under subclass 254.  Subject matter wherein track changing is effected by head movement in a curved path.
  
[List of Patents for class 360 subclass 254.3]    254.3Moving lifter:
 This subclass is indented under subclass 254.2.  Subject matter wherein a lifter is moved to produce or effect movement of a head between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 254.4]    254.4Lifter surface detail:
 This subclass is indented under subclass 254.3.  Subject matter including specifics of the surface of an element contacting the head suspension to provide movement between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 254.5]    254.5Adjustment detail:
 This subclass is indented under subclass 254.3.  Subject matter including specifics of a structure providing for adjustment of the lifter.
  
[List of Patents for class 360 subclass 254.6]    254.6Actuator side detail:
 This subclass is indented under subclass 254.3.  Subject matter including specifics of a portion of an actuator that contacts the lifter.
  
[List of Patents for class 360 subclass 254.7]    254.7Fixed lifter:
 This subclass is indented under subclass 254.2.  Subject matter wherein a stationary lifter contributes to movement of a head between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 254.8]    254.8Lifter surface detail:
 This subclass is indented under subclass 254.7.  Subject matter including specifics of the surface of an element contacting the head suspension to provide movement between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 254.9]    254.9Adjustment detail:
 This subclass is indented under subclass 254.7.  Subject matter including specifics of a structure providing for adjustment of the lifter.
  
[List of Patents for class 360 subclass 255]    255Actuator side detail:
 This subclass is indented under subclass 254.7.  Subject matter including specifics of a portion of an actuator that contacts the lifter.
  
[List of Patents for class 360 subclass 255.1]    255.1Linear track change type:
 This subclass is indented under subclass 254.  Subject matter wherein track changing is effected by linear head movement.
  
[List of Patents for class 360 subclass 255.2]    255.2Moving lifter:
 This subclass is indented under subclass 255.1.  Subject matter wherein a lifter is moved to produce or effect movement of a head between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 255.3]    255.3Lifter surface detail:
 This subclass is indented under subclass 255.2.  Subject matter including specifics of the surface of an element contacting the head suspension to provide movement between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 255.4]    255.4Adjustment detail:
 This subclass is indented under subclass 255.2.  Subject matter including specifics of a structure providing for adjustment of the lifter mechanism.
  
[List of Patents for class 360 subclass 255.5]    255.5Actuator side detail:
 This subclass is indented under subclass 255.2.  Subject matter including specifics of a portion of an actuator that contacts the lifter.
  
[List of Patents for class 360 subclass 255.6]    255.6Fixed lifter:
 This subclass is indented under subclass 255.1.  Subject matter wherein a stationary lifter contributes to movement of a head between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 255.7]    255.7Lifter surface detail:
 This subclass is indented under subclass 255.6.  Subject matter including specifics of the surface of an element contacting the head suspension to provide movement between transducing and nontransducing positions.
  
[List of Patents for class 360 subclass 255.8]    255.8Adjustment detail:
 This subclass is indented under subclass 255.6.  Subject matter including specifics of a structure providing for adjustment of the lifter mechanism.
  
[List of Patents for class 360 subclass 255.9]    255.9Actuator side detail:
 This subclass is indented under subclass 255.6.  Subject matter including specifics of a portion of an actuator that contacts the lifter.
  
[List of Patents for class 360 subclass 256]    256Latch:
 This subclass is indented under subclass 254.  Subject matter wherein a structure is provided to positively retain a head at a nontransducing position.
  
[List of Patents for class 360 subclass 256.1]    256.1Air vane:
 This subclass is indented under subclass 256.  Subject matter including a structure that acts in response to airflow caused by rotation of a disk.
  
[List of Patents for class 360 subclass 256.2]    256.2Magnetic:
 This subclass is indented under subclass 256.  Subject matter utilizing magnetic attraction for latching.
  
[List of Patents for class 360 subclass 256.3]    256.3Electrically driven:
 This subclass is indented under subclass 256.  Subject matter wherein an electrically powered device provides movement of a latch member.
  
[List of Patents for class 360 subclass 256.4]    256.4Inertial:
 This subclass is indented under subclass 256.  Subject matter which utilizes the property of inertia to achieve latching action.
(1) Note. Inertia is that property of matter where an object in motion tends to stay in motion and an object at rest tends to stay at rest unless an external force acts upon the object.
  
[List of Patents for class 360 subclass 256.5]    256.5Plural latches:
 This subclass is indented under subclass 256.  Subject matter including multiple latches.
  
[List of Patents for class 360 subclass 256.6]    256.6Adjustment detail:
 This subclass is indented under subclass 256.  Subject matter including structure providing for adjustment of the latch mechanism.
  
[List of Patents for class 360 subclass 260]    260For shifting head between tracks:
 This subclass is indented under subclass 240.  Subject matter wherein the positioning structure includes mechanical structure for moving a head from one track to another track on the medium.
  
[List of Patents for class 360 subclass 261]    261Tape record having rotary head movement:
 This subclass is indented under subclass 260.  Subject matter wherein the head is rotated to effect movement from one track to the next on a tape.
  
[List of Patents for class 360 subclass 261.1]    261.1Tape record having linear head movement:
 This subclass is indented under subclass 260.  Subject matter wherein the head is moved in a substantially straight line to effect movement from one track to the next on a tape.
  
[List of Patents for class 360 subclass 261.2]    261.2Cam:
 This subclass is indented under subclass 261.1.  Subject matter wherein an element (i.e., cam) has surfaces representing track positions.

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251.3,for head mounting for moving head into/out of transducing position on tape record which includes linear head retraction movement by cam.
  
[List of Patents for class 360 subclass 261.3]    261.3Screw:
 This subclass is indented under subclass 261.1.  Subject matter utilizing a threaded element to effect track changing.
  
[List of Patents for class 360 subclass 264]    264Disk record:
 This subclass is indented under subclass 260.  Subject matter wherein the medium is a circular element adapted for rotation.

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244through 246.8, for head mounting for disk record, in general.
  
[List of Patents for class 360 subclass 264.1]    264.1Arcuate head movement:
 This subclass is indented under subclass 264.  Subject matter wherein track changing is effected by head movement in a curved path.
  
[List of Patents for class 360 subclass 264.2]    264.2Electrical connection detail onto actuator arm:
 This subclass is indented under subclass 264.1.  Subject matter including specifics of electrical attachment at an arm of an actuator.

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439Electrical Connectors,   appropriate subclasses for details of an electrical connector, per se.
  
[List of Patents for class 360 subclass 264.3]    264.3Driver detail:
 This subclass is indented under subclass 264.1.  Subject matter including specifics of a mechanism that produces the arcuate movement.
  
[List of Patents for class 360 subclass 264.4]    264.4Independent head movement:
 This subclass is indented under subclass 264.3.  Subject matter wherein each of multiple heads are moved separately from each other.
  
[List of Patents for class 360 subclass 264.5]    264.5Plural drivers for each head:
 This subclass is indented under subclass 264.3.  Subject matter including multiple drivers for each head.
  
[List of Patents for class 360 subclass 264.6]    264.6Band:
 This subclass is indented under subclass 264.3.  Subject matter wherein a strip (i.e., band) which is usually metallic is utilized to effect the arcuate head movement.
  
[List of Patents for class 360 subclass 264.7]    264.7Voice coil:
 This subclass is indented under subclass 264.3.  Subject matter wherein a voice coil provides motive power for the arcuate head movement.
  
[List of Patents for class 360 subclass 264.8]    264.8Core detail:
 This subclass is indented under subclass 264.7.  Subject matter including specifics of the mechanism providing a magnetic flux path of the driver.
  
[List of Patents for class 360 subclass 264.9]    264.9Magnet detail:
 This subclass is indented under subclass 264.7.  Subject matter including specifics of a permanent magnet structure of the driver.
  
[List of Patents for class 360 subclass 265]    265Winding detail:
 This subclass is indented under subclass 264.7.  Subject matter including specifics of a turn of wire in the driver.
  
[List of Patents for class 360 subclass 265.1]    265.1Limiter/stop:
 This subclass is indented under subclass 264.1.  Subject matter including structure which restricts the arcuate motion of an actuator.
  
[List of Patents for class 360 subclass 265.2]    265.2Bearing:
 This subclass is indented under subclass 264.1.  Subject matter including specifics of a bearing used in the mechanism providing the arcuate head movement.
  
[List of Patents for class 360 subclass 265.3]    265.3Seal:
 This subclass is indented under subclass 265.2.  Subject matter wherein a structure is provided to restrict migration of bearing lubricant.
  
[List of Patents for class 360 subclass 265.4]    265.4Radial:
 This subclass is indented under subclass 265.2.  Subject matter wherein the bearing provides support perpendicular to the pivot axis of the arcuate path.
  
[List of Patents for class 360 subclass 265.5]    265.5Thrust:
 This subclass is indented under subclass 265.2.  Subject matter wherein the bearing provides support about the pivot axis of the arcuate path.
  
[List of Patents for class 360 subclass 265.6]    265.6Mounting detail:
 This subclass is indented under subclass 265.2.  Subject matter including specifics of structure locating and retaining bearing elements.
  
[List of Patents for class 360 subclass 265.7]    265.7E block detail:
 This subclass is indented under subclass 264.1.  Subject matter including specifics of structure mounting driver or head suspension.
  
[List of Patents for class 360 subclass 265.8]    265.8Detail of coil support:
 This subclass is indented under subclass 265.7.  Subject matter including specifics of the support of a coil attached to an E block.
  
[List of Patents for class 360 subclass 265.9]    265.9Detail of actuator arm supporting head suspension:
 This subclass is indented under subclass 265.7.  Subject matter including specifics of an actuator arm to which a head suspension is attached.
  
[List of Patents for class 360 subclass 266]    266Arm shape:
 This subclass is indented under subclass 265.9.  Subject matter including specifics of the geometrical configuration of an actuator arm.
  
[List of Patents for class 360 subclass 266.1]    266.1Arm mounting:
 This subclass is indented under subclass 265.9.  Subject matter including specifics of the attachment of an actuator arm to an E block.
  
[List of Patents for class 360 subclass 266.2]    266.2Linear head movement:
 This subclass is indented under subclass 264.  Subject matter wherein track changing is effected by head movement in a straight path.
  
[List of Patents for class 360 subclass 266.3]    266.3Electrical connection detail onto actuator arm:
 This subclass is indented under subclass 266.2.  Subject matter including specifics of electrical attachment at an arm of an actuator.

SEE OR SEARCH CLASS:

439Electrical Connectors,   appropriate subclasses for details of an electrical connector, per se.
  
[List of Patents for class 360 subclass 266.4]    266.4Voice coil:
 This subclass is indented under subclass 266.2.  Subject matter wherein a voice coil provides motive power for the track changing.
  
[List of Patents for class 360 subclass 266.5]    266.5Carriage detail:
 This subclass is indented under subclass 266.4.  Subject matter including specifics of structure mounting voice coil or head suspension.
  
[List of Patents for class 360 subclass 266.6]    266.6Guide detail:
 This subclass is indented under subclass 266.5.  Subject matter including specifics of structure supporting and constraining the carriage during its movement.
  
[List of Patents for class 360 subclass 266.7]    266.7Core detail:
 This subclass is indented under subclass 266.4.  Subject matter including detail of the structure providing magnetic flux path of the voice coil.
  
[List of Patents for class 360 subclass 266.8]    266.8Magnet detail:
 This subclass is indented under subclass 266.4.  Subject matter including detail of a permanent magnet structure of the voice coil.
  
[List of Patents for class 360 subclass 266.9]    266.9Winding detail:
 This subclass is indented under subclass 266.4.  Subject matter including detail of a turn of wire in the voice coil.
  
[List of Patents for class 360 subclass 267]    267Band:
 This subclass is indented under subclass 266.2.  Subject matter wherein a strip (i.e. band) which is usually metallic is utilized to effect the linear motion.
  
[List of Patents for class 360 subclass 267.1]    267.1Cam:
 This subclass is indented under subclass 266.2.  Subject matter wherein linear head movement is achieved through the use of a cam element.
  
[List of Patents for class 360 subclass 267.2]    267.2Rack:
 This subclass is indented under subclass 266.2.  Subject matter including a bar that interacts with a rotating gear element to transform rotary motion into linear head movement.
  
[List of Patents for class 360 subclass 267.3]    267.3Screw:
 This subclass is indented under subclass 266.2.  Subject matter wherein a threaded element is utilized to effect the linear motion.
  
[List of Patents for class 360 subclass 267.4]    267.4Screw/follower detail:
 This subclass is indented under subclass 267.3.  Subject matter including specifics of the screw itself or an element coacting with the screw.
  
[List of Patents for class 360 subclass 267.5]    267.5Carriage detail:
 This subclass is indented under subclass 267.3.  Subject matter including specifics of structure mounting voice coil or head suspension.
  
[List of Patents for class 360 subclass 267.6]    267.6Guide detail:
 This subclass is indented under subclass 267.5.  Subject matter including specifics of structure supporting and constraining the carriage during its movement.
  
[List of Patents for class 360 subclass 267.7]    267.7Screw mount detail:
 This subclass is indented under subclass 267.3.  Subject matter including detail of an element that locates or retains a screw.
  
[List of Patents for class 360 subclass 267.8]    267.8Adjustable:
 This subclass is indented under subclass 267.7.  Subject matter including a provision for adjusting the location or position of the screw mechanism.
  
[List of Patents for class 360 subclass 267.9]    267.9Including shifting head to different disks:
 This subclass is indented under subclass 264.  Subject matter wherein provision is made for shifting a head between plural disks in addition to shifting a head between tracks on a disk record.
  
[List of Patents for class 360 subclass 270]    270For moving head during transducing:
 This subclass is indented under subclass 240.  Subject matter wherein specific mechanical structure allows for or causes movement of the head during the process of recording or reproducing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

81through 87, for record transport with head moving during transducing, and subclass 101 for head transport with record stationary during transducing.
  
[List of Patents for class 360 subclass 271]    271Tape record having rotary head:
 This subclass is indented under subclass 270.  Subject matter wherein a head is rotated in some fashion during transducing on a tape.
(1) Note. Head mounting allowing for minor repositioning of rotary head in transducing position on a tape record is classified elsewhere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

251.5,for moving a head into/out of transducing position on a tape where the head is of rotary type, and subclasses 291.4-292 for head mounting allowing for minor repositioning of rotary head in transducing position on a tape record.
  
[List of Patents for class 360 subclass 271.1]    271.1Rotating drum:
 This subclass is indented under subclass 271.  Subject matter wherein a head is mounted on a cylinder (i.e., drum) which is rotated during transducing.
  
[List of Patents for class 360 subclass 271.2]    271.2Axle bearing:
 This subclass is indented under subclass 271.1.  Subject matter including specifics of a bearing that supports a drum axle.
  
[List of Patents for class 360 subclass 271.3]    271.3Hydrodynamic:
 This subclass is indented under subclass 271.2.  Subject matter wherein the bearing utilizes moving fluid.
  
[List of Patents for class 360 subclass 271.4]    271.4Axle seal:
 This subclass is indented under subclass 271.1.  Subject matter wherein a structure is provided to restrict migration of lubricant along the drum axle.
  
[List of Patents for class 360 subclass 271.5]    271.5Head mount to drum:
 This subclass is indented under subclass 271.1.  Subject matter including specifics of the mounting of a head to the rotating drum.
  
[List of Patents for class 360 subclass 271.6]    271.6Drum mounting:
 This subclass is indented under subclass 271.1.  Subject matter including specifics of the support or attachment of a drum.
  
[List of Patents for class 360 subclass 271.7]    271.7Drum motor:
 This subclass is indented under subclass 271.1.  Subject matter including specifics of the motor that rotates the drum.
  
[List of Patents for class 360 subclass 271.8]    271.8Stationary drum:
 This subclass is indented under subclass 271.  Subject matter including specifics of a nonmoving drum used in rotary head transducing.
  
[List of Patents for class 360 subclass 271.9]    271.9Electrical connection detail:
 This subclass is indented under subclass 271.8.  Subject matter including specifics of an electrical attachment from a stationary drum to an external point.

SEE OR SEARCH THIS CLASS, SUBCLASS:

234.5,for electrical attachment of slider/head in fluid bearing head support, subclasses 245.8-246 for electrical connection detail in general for disk record head mounting, subclass 264.2 for electrical connection detail onto actuator arm for shifting head in an arcuate path between tracks on a disk record, subclass 266.3 for electrical connection detail onto an actuator arm for shifting head in a linear path between tracks on a disk record, and subclass 281.7 for electrical connection between head and a rotary part of transformer in signal transfer to/from head in rotary head transducing on tape record.

SEE OR SEARCH CLASS:

439Electrical Connectors,   appropriate subclasses for details of an electrical connector, per se.
  
[List of Patents for class 360 subclass 272]    272Power supply:
 This subclass is indented under subclass 271.  Subject matter including structure providing electrical power to a transformer or a signal processing system.
  
[List of Patents for class 360 subclass 274]    274Disk record:
 This subclass is indented under subclass 270.  Subject matter wherein the medium is a circular element adapted for rotation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

244through 246.8, for head mounting for disk record, in general.
  
[List of Patents for class 360 subclass 281]    281Signal transfer to/from head
 This subclass is indented under subclass 271.  Subject matter including structure communicating a signal between a moving head and a stationary part of a recorder.
  
[List of Patents for class 360 subclass 281.1]    281.1Transformer mounting detail:
 This subclass is indented under subclass 281.  Subject matter including specific structure securing or positioning a transformer.
  
[List of Patents for class 360 subclass 281.2]    281.2Transformer axis parallel to axis of head rotation:
 This subclass is indented under subclass 281.  Subject matter wherein the axis of the transformer is parallel to the rotational axis of the head.
(1) Note. The transformer axis as used here is defined as the plane of the gap between stationary and moving parts of a transformer.
  
[List of Patents for class 360 subclass 281.3]    281.3Transformer axis perpendicular to axis of head rotation:
 This subclass is indented under subclass 281.  Subject matter wherein the axis of the transformer is perpendicular to the rotational axis of the head.
(1) Note. The transformer axis as used here is defined as the plane of the gap between stationary and moving parts of a transformer.
  
[List of Patents for class 360 subclass 281.4]    281.4Coil/winding detail:
 This subclass is indented under subclass 281.  Subject matter including specifics of a turn of wire in the transformer.
  
[List of Patents for class 360 subclass 281.5]    281.5Core detail:
 This subclass is indented under subclass 281.  Subject matter including specifics of the structure providing a flux path for the transformer.
  
[List of Patents for class 360 subclass 281.6]    281.6Electrical or magnetic shielding:
 This subclass is indented under subclass 281.  Subject matter including structure providing shielding from electrical or magnetic fields.
  
[List of Patents for class 360 subclass 281.7]    281.7Electrical connection between head and rotary part of transformer:
 This subclass is indented under subclass 281.  Subject matter including structure electrically joining a head and the rotating part of a transformer.

SEE OR SEARCH CLASS:

439Electrical Connectors,   appropriate subclasses for details of an electrical connector, per se.
  
[List of Patents for class 360 subclass 281.8]    281.8Plural transformers:
 This subclass is indented under subclass 281.  Subject matter wherein multiple transformers are utilized in the signal transfer.
  
[List of Patents for class 360 subclass 281.9]    281.9Photoelectric:
 This subclass is indented under subclass 281.  Subject matter wherein a photoelectric element is utilized in the signal transfer.
  
[List of Patents for class 360 subclass 282]    282Contact type transformer:
 This subclass is indented under subclass 281.  Subject matter wherein transformer elements are in physical contact.
  
[List of Patents for class 360 subclass 290]    290For adjusting head position:
 This subclass is indented under subclass 240.  Subject matter wherein the positioning structure allows minor repositioning of the head within a transducing position.
  
[List of Patents for class 360 subclass 291]    291Tape record:
 This subclass is indented under subclass 290.  Subject matter wherein the medium is in the form of an elongated ribbon.

SEE OR SEARCH THIS CLASS, SUBCLASS:

241through 241.3, for head mounting for tape record, in general.
  
[List of Patents for class 360 subclass 291.1]    291.1Cam adjuster:
 This subclass is indented under subclass 291.  Subject matter wherein a cam element provides head adjustment.
  
[List of Patents for class 360 subclass 291.2]    291.2Screw adjuster:
 This subclass is indented under subclass 291.  Subject matter wherein a threaded element provides head adjustment.
  
[List of Patents for class 360 subclass 291.3]    291.3Plural screws:
 This subclass is indented under subclass 291.2.  Subject matter wherein head adjustment is provided by multiple threaded elements.
  
[List of Patents for class 360 subclass 291.4]    291.4Rotary head:
 This subclass is indented under subclass 291.  Subject matter wherein a head is rotated during transducing.

SEE OR SEARCH THIS CLASS, SUBCLASS:

251.5,for moving a head into/out of transducing position on a tape where the head is of rotary type, and subclass 271 for a tape record having rotary head during transducing.
  
[List of Patents for class 360 subclass 291.5]    291.5Adjustment of drum axis:
 This subclass is indented under subclass 291.4.  Subject matter including adjustment of the axis of rotation of a drum that supports a head for rotation.
  
[List of Patents for class 360 subclass 291.6]    291.6Adjustable head mount:
 This subclass is indented under subclass 291.4.  Subject matter wherein the immediate head mounting structure on a drum provides the adjustment.
  
[List of Patents for class 360 subclass 291.7]    291.7Adjuster core detail:
 This subclass is indented under subclass 291.6.  Subject matter including specifics of the structure providing magnetic flux path of an adjuster.
  
[List of Patents for class 360 subclass 291.8]    291.8Adjuster coil detail:
 This subclass is indented under subclass 291.6.  Subject matter including specifics of a turn of wire in an adjuster.
  
[List of Patents for class 360 subclass 291.9]    291.9Piezoelectric adjuster:
 This subclass is indented under subclass 291.6.  Subject matter wherein a piezoelectric element is utilized to provide adjustment.
  
[List of Patents for class 360 subclass 292]    292Plural piezoelectric adjusters:
 This subclass is indented under subclass 291.9.  Subject matter wherein adjustment is provided by multiple piezoelectric elements.
  
[List of Patents for class 360 subclass 294]    294Disk record:
 This subclass is indented under subclass 290.  Subject matter wherein the medium is a circular element adapted for rotation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

244through 246.8, for head mounting for a disk, in general.
  
[List of Patents for class 360 subclass 294.1]    294.1Adjustment parallel to disk plane:
 This subclass is indented under subclass 294.  Subject matter wherein a head is moved parallel to the plane of the disk during adjustment.
  
[List of Patents for class 360 subclass 294.2]    294.2Linear adjustment:
 This subclass is indented under subclass 294.1.  Subject matter wherein a head is moved in a straight line to achieve adjustment.
  
[List of Patents for class 360 subclass 294.3]    294.3Driver detail:
 This subclass is indented under subclass 294.1.  Subject matter including specifics of a mechanism that provides adjustment movement.
  
[List of Patents for class 360 subclass 294.4]    294.4Piezoelectric adjuster:
 This subclass is indented under subclass 294.3.  Subject matter wherein a piezoelectric element is utilized to provide adjustment.
  
[List of Patents for class 360 subclass 294.5]    294.5Voice coil adjuster:
 This subclass is indented under subclass 294.3.  Subject matter wherein a voice coil mechanism is utilized to provide adjustment.
  
[List of Patents for class 360 subclass 294.6]    294.6Pivot structure detail:
 This subclass is indented under subclass 294.1.  Subject matter including detail of a structure permitting a turning about a point (i.e., pivot) for adjustment.
  
[List of Patents for class 360 subclass 294.7]    294.7Adjustment along rotational axis of disk:
 This subclass is indented under subclass 294.  Subject matter wherein a head is moved perpendicular to the plane of the disk during adjustment.
  
[List of Patents for class 360 subclass 313]    313Magnetoresistive (MR) reproducing head:
 This subclass is indented under subclass 110.  Subject matter including a sensor for reproducing magnetic information by utilizing a material whose resistance varies in accordance with a magnetic field.

SEE OR SEARCH THIS CLASS, SUBCLASS:

328,for a magnetostrictive head.

SEE OR SEARCH CLASS:

324Electricity: Measuring and Testing,   subclass 252 , for magneto-resistive sensing means.
338Electrical Resistors,   subclass 32 for an electrical resistor which is responsive to a magnetic field.
365Static Information Storage and Retrieval,   subclass 8 for magnetic bubbles which use magnetoresistive devices, and subclass 158 for static storage systems which use magnetoresistive type storage elements.
  
[List of Patents for class 360 subclass 314]    314Having multiple interconnected multiple film MR sensors (e.g., dual spin valve magnetoresistive sensor):
 This subclass is indented under subclass 313.  Subject matter wherein plural MR sensors are connected together to reproduce information from a single track wherein one of the MR sensors is formed of multiple thin films.
  
[List of Patents for class 360 subclass 315]    315Having multiple interconnected single film MR sensors (e.g., dual magnetoresistive sensor):
 This subclass is indented under subclass 313.  Subject matter wherein plural MR sensors are connected together to reproduce information from a single track wherein all of the MR sensors are formed of a single film.
  
[List of Patents for class 360 subclass 316]    316Having multiple independent MR sensors:
 This subclass is indented under subclass 313.  Subject matter wherein plural unrelated MR sensors reproduce information from plural tracks.
  
[List of Patents for class 360 subclass 317]    317Combined with inductive write head in piggyback/merged configuration:
 This subclass is indented under subclass 313.  Subject matter having a magnetoresistive head used for reproducing information and an inductive head used for recording information wherein the magnetoresistive head and the inductive head are stacked.
  
[List of Patents for class 360 subclass 318]    318Combined with inductive write head and having MR inside of inductive head:
 Subject matter under 313 having a magnetoresistive head used for reproducing information and an inductive head used for recording information wherein the magnetoresistive head is located inside of the inductive head.
  
[List of Patents for class 360 subclass 318.1]    318.1In horizontal head configuration:
 This subclass is indented under subclass 318.  Subject matter wherein the substrate of the inductive head is in a horizontal orientation.
  
[List of Patents for class 360 subclass 319]    319Detail of magnetic shielding:
 This subclass is indented under subclass 313.  Subject matter including specifics of material which blocks undesired magnetic flux from an MR sensor.
  
[List of Patents for class 360 subclass 320]    320Detail of head insulation:
 This subclass is indented under subclass 313.  Subject matter including specifics of material that provides electrical isolation for a head.
  
[List of Patents for class 360 subclass 321]    321Having flux guide detail:
 This subclass is indented under subclass 313.  Subject matter including specifics of material that delivers flux from a magnetic medium to an MR sensor.
  
[List of Patents for class 360 subclass 322]    322Detail of sense conductor:
 This subclass is indented under subclass 313.  Subject matter including specifics of the leads that provide a sense current.
  
[List of Patents for class 360 subclass 323]    323Electrostatic Discharge (ESD) protection:
 This subclass is indented under subclass 313.  Subject matter wherein damage to an MR sensor by static electrical discharge is prevented.
  
[List of Patents for class 360 subclass 324]    324Having Giant Magnetoresistive (GMR) or Colossal Magnetoresistive (CMR) sensor formed of multiple thin films:
 This subclass is indented under subclass 313.  Subject matter wherein plural films form a single MR sensor that exhibits a large change in resistance to a small amount of magnetic flux.

SEE OR SEARCH THIS CLASS, SUBCLASS:

326,for a GMR or CMR sensor formed of a single thin film.
  
[List of Patents for class 360 subclass 324.1]    324.1Having one film pinned (e.g., spin valve):
 This subclass is indented under subclass 324.  Subject matter wherein the magnetization direction of one of the layers is fixed.
  
[List of Patents for class 360 subclass 324.11]    324.11Detail of pinned film or additional film for affecting or biasing the pinned film:
 This subclass is indented under subclass 324.1.  Subject matter including specifics of a layer having fixed magnetization direction or an additional layer that affects or biases such a pinned layer.
  
[List of Patents for class 360 subclass 324.12]    324.12Detail of free layer or additional film for affecting or biasing the free layer:
 This subclass is indented under subclass 324.1.  Subject matter including specifics of a layer having a freely rotatable direction of magnetization or an additional layer that affects or biases such a free layer.
  
[List of Patents for class 360 subclass 324.2]    324.2Having tunnel junction effect:
 This subclass is indented under subclass 324.  Subject matter including a nonmetal film between two films having distinct magnetization directions wherein an electron tunnels through the nonmetal film.
  
[List of Patents for class 360 subclass 325]    325Having Anisotropic Magnetoresistive (AMR) sensor formed of multiple thin films:
 This subclass is indented under subclass 313.  Subject matter wherein the resistance of a multiple film sensor changes in accordance with a change in the angle between the magnetization direction of the multiple film sensor and a sense current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

327through 327.33, for an AMR sensor formed of a single thin film.
  
[List of Patents for class 360 subclass 326]    326Having Giant Magnetorestrictive (GMR) or Colossal Magnetoresistive (CMR) sensor formed of a single thin film:
 This subclass is indented under subclass 313.  Subject matter wherein a single film forms an MR sensor that exhibits a large change in resistance to a small amount of magnetic flux.

SEE OR SEARCH THIS CLASS, SUBCLASS:

324through 324.2, for a GMR or CMR sensor formed of multiple thin films.
  
[List of Patents for class 360 subclass 327]    327Having Anisotropic Magnetoresistive (AMR) sensor formed of a single thin film:
 This subclass is indented under subclass 313.  Subject matter wherein the resistance of a single thin film changes in accordance with a change in the angle between the magnetization direction of the single thin film and a sense current.

SEE OR SEARCH THIS CLASS, SUBCLASS:

325,for an AMR sensor formed of multiple thin films.
  
[List of Patents for class 360 subclass 327.1]    327.1Detail of transverse and longitudinal biasing:
 This subclass is indented under subclass 327.  Subject matter wherein an additional film is provided to linearize the MR sensor and to create a single magnetic domain within the MR sensor.
  
[List of Patents for class 360 subclass 327.11]    327.11In barber-pole configuration:
 This subclass is indented under subclass 327.1.  Subject matter having slanted conductive strips that overlay the MR sensor.
  
[List of Patents for class 360 subclass 327.2]    327.2Detail of transverse biasing:
 This subclass is indented under subclass 327.  Subject matter wherein an additional film is provided to linearize the MR sensor.
  
[List of Patents for class 360 subclass 327.21]    327.21Using a shunt:
 This subclass is indented under subclass 327.2.  Subject matter wherein the additional film diverts a portion of the sense current to provide the transverse bias.
  
[List of Patents for class 360 subclass 327.22]    327.22Using a soft adjacent layer:
 This subclass is indented under subclass 327.2.  Subject matter wherein the additional film is magnetized by a sense current flowing in the MR sensor and this film then sets up a magnetizing field for transversely biasing the MR sensor.
  
[List of Patents for class 360 subclass 327.23]    327.23Using a permanent magnet:
 This subclass is indented under subclass 327.2.  Subject matter wherein the additional film is a permanently magnetized material.
  
[List of Patents for class 360 subclass 327.24]    327.24Using conductor:
 This subclass is indented under subclass 327.2.  Subject matter wherein the additional film uses a current to create the transverse bias.

SEE OR SEARCH THIS CLASS, SUBCLASS:

327.21,for transverse biasing using a shunt.
  
[List of Patents for class 360 subclass 327.3]    327.3Detail of longitudinal biasing:
 This subclass is indented under subclass 327.  Subject matter wherein an additional film is used to create a single magnetic domain within the MR sensor.
  
[List of Patents for class 360 subclass 327.31]    327.31Using a permanent magnet:
 This subclass is indented under subclass 327.3.  Subject matter wherein the additional film is a permanently magnetized material.
  
[List of Patents for class 360 subclass 327.32]    327.32Using exchange couple biasing:
 This subclass is indented under subclass 327.3.  Subject matter wherein a film is in direct atomic contact with the MR sensor to unidirectionally bias the MR sensor into a single domain.
  
[List of Patents for class 360 subclass 327.33]    327.33Using conductor:
 This subclass is indented under subclass 327.3.  Subject matter wherein the additional film uses a current to create the longitudinal bias.
  
[List of Patents for class 360 subclass 328]    328Magnetostrictive head:
 This subclass is indented under subclass 110.  Subject matter including a sensor for recording/reproducing magnetic information by utilizing a material that expands or contracts in accordance with a magnetic field.

SEE OR SEARCH THIS CLASS, SUBCLASS:

313through 327.33, for a magnetoresistive reproducing head.

SEE OR SEARCH CLASS:

338Electrical Resistors,   subclass 32 for an electrical resistor which is responsive to a magnetic field.
365Static Information Storage and Retrieval,   subclass 157 for static storage systems which use magnetostrictive type storage elements.
  

CROSS-REFERENCE ART COLLECTIONS

[List of Patents for class 360 subclass 900]    900DISK DRIVE PACKAGING:
 Subject matter comprising a magnetic disk information storage and retrieval device and its associated circuitry having miniaturized features.
  
[List of Patents for class 360 subclass 901]    901Access time:
 This subclass is indented under subclass 900.  Subject matter wherein an interval between seeking data from a disk drive to an instant of completion of (b) data delivery to an output device, or (a) head positioning to transduce the data.
  
[List of Patents for class 360 subclass 902]    902Storage density (e.g., bpi, tpi):
 This subclass is indented under subclass 900.  Subject matter wherein spacing or placement of individual data bits are stored per unit length on the disk.
  
[List of Patents for class 360 subclass 903]    903Physical parameter (e.g., form factor):
 This subclass is indented under subclass 900.  Subject matter comprising physical properties such as geometrical shape or dimensions of a disk drive.
  
[List of Patents for class 360 subclass 904]    904Weight:
 This subclass is indented under subclass 903.  Subject matter wherein the physical parameter is the weight of the disk drive or a component thereof that the magnetic disk drive weighs.
  

FOREIGN ART COLLECTIONS

Any foreign patents/nonpatent literature, which were reclassified, have been transferred directly to the art collection listed below. This art collection contains ONLY foreign documents/nonpatent literature. [Note: Parenthetical references in the titles refer to the abolished U.S. classifications from which these art collections were derived.]

FOR 202FLUID BEARING HEAD (360/102):
 Foreign art collection under the class definition including the generation of a fluid bearing between a record carrier and a head.
  
FOR 203Flying head (360/103):
 Foreign art collection under collection FOR 202 wherein the head is mounted in such a fashion as to allow it to move into a floating position with respect to a record carrier.
  
FOR 204HEAD MOUNTING (360/104):
 Foreign art collection under the class definition including specific mechanical means for holding a head in a proper position with respect to a record carrier.
  
FOR 205For moving head into and out of transducing position (360/105):
 Foreign art collection under collection FOR 204 wherein the positioning means allows selective movement of the head to a position other than the transducing position.
  
FOR 206For shifting head between tracks (360/106):
 Foreign art collection under collection FOR 204 wherein the positioning means allows selective movement of the head between several transducing positions.
  
FOR 207For moving head during transducing (360/107):
 Foreign art collection under collection FOR 204 wherein the positioning means allows for or causes movement of the head during the process of recording or reproducing.
  
FOR 208Signal transfer to and from head (360/108):
 Foreign art collection under collection FOR 207 including means for communicating a signal between the moving head and a stationary part of the recorder.
  
FOR 209For adjusting head position (360/109):
 Foreign art collection under collection FOR 204 wherein the positioning means allows minor repositioning of a head within a transducing position.
  
FOR 213MAGNETORESISTIVE OR MAGNETOSTRICTIVE HEAD(360/113):
 Foreign art collection under the class definition including specific structure of a transducer which includes an element exhibiting a magnetoresistive or magnetostrictive effect and that element and its associated effect is used to produce, detect, or control production or detection of magnetic flux.
  
FOR 214Magneto optic:
 Foreign art collection wherein the intensity of the flux emanating from a record is determined by directing a beam of polarized light at the record and detecting the rotation of polarization caused by the flux.
  
FOR 225Disk record (360/97.01):
 This foreign art collection is indented under unnumbered placeholder 360/88. Foreign art collection in which the record carrier is a flat circular element.
(1) Note. The mechanism for imparting motion for recording and reproduction is generally in a drive assembly and rotates the disk about its axis of symmetry.
  
FOR 226Environmental control (e.g., air filter, temperature control) (360/97.02):
 This foreign art collection is indented under FOR 225. Foreign art collection wherein an ambient condition of the disk drive is controlled.
  
FOR 227Plural disks (360/97.03):
 This foreign art collection is indented under FOR 226. Foreign art collection for varying or maintaining an environmental condition for a disk drive which has structure for concurrent accommodation of multiple disks.
  
FOR 228Flexible disk (360/97.04):
 This foreign art collection is indented under FOR 226. Foreign art collection for varying or maintaining an environmental condition in a disk drive for a disk record carrier which is bendable or pliable without permanent change.
  

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