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 [Search a list of Patent Appplications for class 345]   CLASS 345,COMPUTER GRAPHICS PROCESSING AND SELECTIVE VISUAL DISPLAY SYSTEMS
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SECTION I - CLASS DEFINITION

This class provides for processes and apparatus for selective electrical control of two or more light-generating or light-controlling display elements* in accordance with a received or stored image data signal. The image data includes character, graphical information or display attribute data. The image data may include, for example, information data from a peripheral input device, from the reception of a television signal, from the recognition of image data, or from the generation or creation of image data by a computer.

This class also provides for digital data processing systems or methods for data processing for visual presentation, wherein the processing of data includes the creation or manipulation of graphic objects (e.g., artificial images), or text.

SCOPE OF THE CLASS

(1) Note. This class includes a display controller* for accessing image data. The display control includes, for example, control between a display memory and the display elements*. The display control may be performed by a processor, wherein enhancements for a previously created and stored image are provided. Examples of such display control include display memory addressing, display screen energizing, and received image data control in response to input signals applied to the display control to provide an enhanced image for display. A specific display system* in combination with a data processor or computer is classified herein.
(2) Note. The display elements* of this class include, for example, (1) a CRT display wherein visual elements* of the image or message originate at the light-emitting screen of a cathode-ray tube, (2) a flat panel display (non-CRT display system*) wherein visual elements* of image or message are the result of light producers or light controllers arranged in a tangible mechanical grouping or array, (3) any matrix arrangement of light-generating or light-controlling display elements* with selective electrical display control, or (4) any plural arrangement of segmented light-generating or light-controlling display elements* with selective electrical display control.
(3) Note. Claimed subject matter directed to a display function (waveform) generator combined with a display is classified herein unless there is claimed structure relating to the manner in which the waveform is detected or measured.
(4) Note. Generally, significantly claimed structure external to this class, claimed in combination with subject matter under the class definition above, which displays or produces an image or message related to such external structure or its function, is classified in the class appropriate to the external structure; however, a significantly claimed operator interface claimed in combination with computer graphics processing such as attribute processing or graphic manipulation, which displays or produces an image or message related to such operator interface is classified herein. Further, nominally claimed structure external to this class, claimed in combination with subject matter under this class definition, is classified in this class unless provided for in the appropriate external class.
(5) Note. This class provides for peripheral input devices which include a manually actuatable selective means (e.g., keyboards, light pens, joysticks, mice, and touch tablets etc.) to selectively input the information data to the selective display control which translates the selective input into a message symbol or image, (e.g., a character or graphic object) on the display to an observer.
(6) Note. This class also provides for display storage devices such as display memory with more than nominal recitation of their organization and structure claimed for storing the previously created or generated data to be displayed on the display.
(7) Note. Graphic objects of this class are defined by their coordinates, shape, size, and attributes. Such graphic objects define a portion of a displayed image and may be a combination of computer generated objects and real life images.
(8) Note. Information processing for creating a visual image which includes more than a nominal recitation of information processing is classified herein.
(9) Note. The use of a memory system for processing in conjunction with a data presentation/computer graphics system (e.g., for manipulating the addressing or contents of image or text data stored in a memory) is classified herein.
(10) Note. Font generation for display and font processing to form the character patterns is classified herein.
(11) Note. Color information processing wherein the color in the image is calculated, is classified herein (e.g., shading, interpolating color values in a polygon).
(12) Note. Generation or manipulation of three dimensional or perspective display information or objects, generation or control of a mapping pattern, or animation are classified in this class.
(13) Note. Systems which display a change of appearance, where the change is computer generated (e.g., creation or modification of hairstyles or clothing to be overlaid with a video image or a model), are classified in this class.

SECTION II - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

40, Card, Picture, or Sign Exhibiting,   particularly subclass 406 for display device with gas or liquid movement.
74, Machine Element or Mechanism,   particularly subclass 471 for control elements which move in two planes.
116, Signals and Indicators,   particularly subclasses 200 through 337for various indicators.
178, Telegraphy,   particularly subclasses 18.01 through 20.04for digitizing writing tablets, stylus, and circuits.
200, Electricity: Circuit Makers and Breakers,   particularly subclass 5 for multiple switch control.
235, Registers,   particularly subclasses 375 through 386for systems controlled by data bearing records which may include selective display; various subclasses for basic machines and associated indicating mechanisms for ascertaining the number of movements of various devices and machines, plus machines made from these basic machines alone (e.g., cash registers, voting machines), and in combination with various perfecting features, such as printers and recording means.
250, Radiant Energy,   subclasses 200 through 239for light detection using photocell circuitry and subclass 553 for light source array or matrix.
257, Active Solid-State Devices (e.g., Transistors, Solid-State Diodes),   appropriate subclasses for single, plural, and integrated element solid-state light source.
273, Amusement Devices: Games,   appropriate subclasses for TV games using display device.
313, Electric Lamp and Discharge Devices,   appropriate subclasses for some light sources, per se, particularly subclasses 484 through 493for gaseous discharge display panel and subclasses 498-512 for solid-state type device.
315, Electric Lamp and Discharge Devices: Systems,   appropriate subclasses for structure of cathode-ray tube energizing circuits and subclass 169.1 – 169.4 for structure of panel display devices (e.g., electroluminescent and gas display).
324, Electricity: Measuring and Testing,   subclass 121 for measuring and testing electricity using a CRT.
326, Electronic Digital Logic Circuitry,   appropriate subclassesfor electronic digital logic circuits; and appropriate subclasses for generic digital logic devices, circuitry, and subcombinations thereof, wherein nonarithmetical operations are performed upon discrete electrical signals representing a value normally described by numerical digits.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 108 through 112for miscellaneous current driving circuits.
340, Communications: Electrical,   subclasses 825 through 825.98for controlling one or more devices to obtain a plurality of results by transmission of a designated one of plural distinctive control signals over a smaller number of communication lines or channels, particularly subclasses 2.1-2.8 for path selection, subclasses 3.1-3.9 for communication systems where status of a controlled device is communicated, subclass 825.02 for tree or cascade selective communication, subclasses 825.2-825.21 for synchronizing selective communication systems, subclasses 825.52 and 825.53 for addressing, and subclasses 825.57-825.69 for pulse responsive actuation.
341, Coded Data Generation or Conversion,   subclasses 22 through 34for bodily actuated code generation relating to a keyboard; and various subclasses for electrical pulse and digit code converters (e.g., systems for originating or emitting a coded set of discrete signals or translating one code into another code wherein the meaning of the data remains the same but the formats may differ).
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),   subclass 142 for radar display systems using a CRT display.
348, Television,   appropriate subclassesfor systems and subsystems for display of television (real time scanned produced) signals.
349, Liquid Crystal Cells, Elements and Systems,   appropriate subclasses for the details of a liquid crystal cell structure.
352, Optics: Motion Pictures,   subclass 87 where motion picture animation will be found.
353, Optics: Image Projectors,   appropriate subclasses for specifics of optics involved with an image projector.
358, Facsimile and Static Presentation Processing,   subclasses 1.1 through 1.18for static presentation processing.
359, Optical: Systems and Elements,   subclasses 237 through 324for structure relating to an optical modulator and subclasses 443-461 for projection screens.
360, Dynamic Magnetic Information Storage or Retrieval,   (which is an integral part of Class 369 following subclass 18 ), appropriate subclasses for record carriers and systems wherein information is stored and retrieved by interaction with a medium and there is relative motion between a medium and a transducer, for example, magnetic disk drive devices and control thereof, per se.
362, Illumination,   appropriate subclasses for a specific illumination device and particularly subclasses 227 through 252for plural light sources for general lighting uses.
365, Static Information Storage and Retrieval,   subclasses 106 through 119and 120-128 for storage systems using visible light for the retrieval of stored information instead of for the display of a selected image (message or data); and various subclasses for addressable static singular storage elements or plural singular storage elements of the same type (i.e., the internal elements of memory, per se).
368, Horology: Time Measuring Systems or Devices,   subclasses 223 through 242for displays of time (i.e., watches).
369, Dynamic Information Storage or Retrieval,   particularly subclasses 99 through 175for information handling in conjunction with a dynamic store; and various subclasses for record carriers and systems wherein information is stored and retrieved by interaction with a medium and there is relative motion between a medium and a transducer.
377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,   subclasses 112 through 113for display control with registers; and various subclasses for generic circuits for pulse counting.
379, Telephonic Communications,   subclass 96 for displaying digital information on a terminal.
380, Cryptography,   appropriate subclasses for cryptographic electric signal modification in general.
382, Image Analysis,   appropriate subclasses, for previously scanned image data and for image recognition, processing and nominal display relating to such recognition; and various subclasses for operations performed on image data with the aim of measuring a characteristic of an image, detecting variations, detecting structures, or transforming the image data, and for procedures for analyzing and categorizing patterns present in image data.
400, Typewriting Machines,   particularly subclasses 83 through 85for typewriting machines including a display.
434, Education and Demonstration,   subclasses 1 through 10for system performing distant object energy sensing wherein said systems include a display, subclasses 307 and 323 for educational system including a CRT.
463, Amusement Devices: Games,   subclasses 1 through 47, where there is recited a method or apparatus for moving or processing information specified as game or contest information (e.g., a video game, etc.), especially subclasses 31-34 for specifics of processing visual information data in a game or contest appropriate for Class 463.
705, Data Processing: Financial, Business Practice, Management, or Cost/Price Determination,   appropriate subclasses for user interface specific to business practice.
707, Data Processing: Database and File Management or Data Structures,   subclasses 1 through 10for database specific user interface.
708, Electrical Computers: Arithmetic Processing and Calculating,   subclasses 270 through 277for mathematical function generation and subclass 849 for specialized analog function generation including a CRT display.
713, Electrical Computers and Digital Processing Systems: Support,   subclass 187 and 188 for software program protection or computer virus detection in combination with data encryption.
714, Error Detection/Correction and Fault Detection/Recovery,   appropriate subclasses for generic electrical pulse or pulse coded data error detection and correction.
715, Data Processing: Presentation Processing of Document, Operator Interface Processing, and Screen Saver Display Processing,   appropriate subclasses for document processing specific user interface, for an operator interface generally, or for screen saver display processing.

SECTION III - GLOSSARY

The following terms have been defined for purposes of classification in this class. In the class and subclass definition of this class, terms used in a sense defined below are indicated by an asterisk (*). When these terms are not indicated by an asterisk(*) in the definitions, the meaning is not restricted to the glossary definitions below.

ADDRESS DATA

Data that represent or identify a source or destination. (also see: Data)

ALPHANUMERIC

Any symbol found in the ASCII character set.

BUS

A conductor used for transferring data, signals, or power.

COMPUTER

A machine that inputs data, processes data, stores data, and outputs data.

DATA

Representation of information in a coded manner suitable for communication, interpretation, or processing. Also see: Address Data; Instruction Data; Status Data; User Data.

DATA PROCESSING

See PROCESSING, below.

DISPLAY CONTROLLER

An electrical circuit which actuates a display device* in accordance with received image data*.

DIGITAL DATA PROCESSING SYSTEM

An arrangement of processor(s) in combination with either memory or peripherals, or both, performing data processing.

DISPLAY DEVICE

A communication device which converts image data* into a visual image*.

DISPLAY ELEMENT

Means for producing a visual effect in a display device* comprised of a plurality (e.g., matrix) of such means.

DISPLAY SYSTEM

A system which comprises one or more display termnals* or one or more display devices*.

DISPLAY TERMINAL

A unit which comprises at least one display device* and user interface control means (e.g., mouse).

IMAGE DATA

The information provided to form the visual image*.

INFORMATION

Meaning that a human being assigns to data by means of the conventions applied to that data.

INSTRUCTION DATA

Data that represent an operation and identify its operands, if any. (also see: Data)

MEMORY

A functional unit to which data can be stored and from which data can be retrieved.

PERIPHERAL

A functional unit that transmits data to or receives data from a computer to which it is coupled.

PROCESSING

Methods or apparatus performing systematic operations upon data or information exemplified by functions such as data or information transferring, merging, sorting, and computing (i.e., arithmetic operations or logical operations).

(1) Note. In this class, the glossary term data is used to modify processing in the term data processing; whereas the term digital data processing system refers to a machine performing data processing.
(2) Note. In an effort to avoid redundant constructions, in this class, where appropriate, the term address data processing is used in place of address data data processing.

PROCESSOR

A functional unit that interprets and executes instruction data.

STATUS DATA

Data that represent conditions of data, digital data processing systems, computers, peripherals, memory, etc. (also see: Data)

USER DATA

Data other than address data, instruction data, or status data. (also see: Data)

VISUAL ELEMENT

The smallest constituent part of a composite visual image*. A visual element* may be the visual effect produced by a display element*.

VISUAL IMAGE

The resultant image shown by the display device*.

SUBCLASSES

[List of Patents for class 345 subclass 1.1]    1.1PLURAL DISPLAY SYSTEMS:
 This subclass is indented under the class definition.  Subject matter including more than one visual display system.
(1) Note. The use of adjacent Arts to display a large image is typical of this type of plural display system.

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4,for a single display system having plural display devices.

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709, Electrical Computers and Digital Processing Systems: Multiple Computer or Process Coordinating,   appropriate subclassesfor transmission of information among multiple computer systems.
710, Electrical Computers and Digital Data Processing Systems: Input/Output,   subclasses 1 through 74for input/output data processing, and subclasses 100-132 for intrasystem connection in a digital data processing system.
  
[List of Patents for class 345 subclass 1.2]    1.2Data transmitted or received at surface of display:
 This subclass is indented under subclass 1.1.  Subject matter wherein the more than one visual display system includes plural display terminals in which a user uses an electronic device to transmit and or receive data at the display surface by electromagnetic means.
  
[List of Patents for class 345 subclass 1.3]    1.3Tiling or modular adjacent displays:
 This subclass is indented under subclass 1.1.  Subject matter wherein the more than one visual display system includes plural displays adjacent to be viewed by the same user.
  
[List of Patents for class 345 subclass 2.1]    2.1Remotely located:
 This subclass is indented under subclass 1.1.  Subject matter wherein the more than one visual display system includes plural display terminals that are positioned at separate locations where they cannot be viewed simultaneously.
(1) Note. Display terminals in different offices of a work environment are typical of this type of plural display system.
  
[List of Patents for class 345 subclass 2.2]    2.2Presentation of similar images:
 This subclass is indented under subclass 2.1.  Subject matter wherein the plural display terminals positioned at separate locations have similar images that are controlled by the users at the separate locations.
(1) Note. These systems are used to jointly edit a common image or text that is simultaneously displayed.
  
[List of Patents for class 345 subclass 2.3]    2.3Wireless connection:
 This subclass is indented under subclass 2.1.  Subject matter wherein the plural display terminals positioned at separate locations receive data for display by wireless means and require further processing before driving a computer display.
  
[List of Patents for class 345 subclass 3.1]    3.1Diverse systems (e.g., CRT or LCD interface):
 This subclass is indented under subclass 1.1.  Subject matter wherein the plural display systems are different types.
(1) Note. Different types of display systems include Arts, Led, Lacs, plasma, etc.
  
[List of Patents for class 345 subclass 3.2]    3.2Frame, field, or scan rate conversion:
 This subclass is indented under subclass 3.1.  Subject matter wherein the different display types require a conversion of the frame, field, or scan rate before driving each display type.
  
[List of Patents for class 345 subclass 3.3]    3.3Number of pixels per row or column conversion (i.e., resolution conversion):
 This subclass is indented under subclass 3.1.  Subject matter wherein the different display types require a conversion of the number of pixel per row and/or column before driving each display type.
  
[List of Patents for class 345 subclass 3.4]    3.4Controller automatically senses monitor resolution:
 This subclass is indented under subclass 3.3.  Subject matter wherein the selective electrical control determines, without human intervention, the maximum number of pixels that can be displayed on a display.
  
[List of Patents for class 345 subclass 4]    4SINGLE DISPLAY SYSTEM HAVING STACKED SUPERIMPOSED DISPLAY DEVICES (E.G., TANDEM):
 This subclass is indented under the class definition.  Subject matter in which one transparent display device* is positioned above another display device*.

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629through 641, for a single display device having a superimposed overlay.
  
[List of Patents for class 345 subclass 5]    5Diverse display devices:
 This subclass is indented under subclass 4.  Subject matter wherein the stacked display devices* are different types of display devices* (e.g., EL and LCD).

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3.1,for diverse plural display systems.
  
[List of Patents for class 345 subclass 6]    6Three-dimensional arrays:
 This subclass is indented under subclass 4.  Subject matter wherein the images from the stacked superimposed display devices* together provide a resultant display with perspective.

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419,for three-dimensional presentation processing.
  
[List of Patents for class 345 subclass 7]    7IMAGE SUPERPOSITION BY OPTICAL MEANS (E.G., HEADS-UP DISPLAY):
 This subclass is indented under the class definition.  Subject matter wherein a single visual image* from a display device* is superimposed with an external world scene by some light-affecting means.

SEE OR SEARCH CLASS:

340, Communication: Electrical,   subclasses 901+ for external condition vehicle-mounted indicators.
359, Optical: Systems and Elements,   subclasses 630+ for specific optical components of heads-up arrangement.
  
[List of Patents for class 345 subclass 8]    8Operator body-mounted heads-up display (e.g., helmet mounted display):
 This subclass is indented under subclass 7.  Subject matter wherein the display device* for providing the single visual image* is assembled on a helmet worn on the operator"s head or is carried on the operator"s body.
  
[List of Patents for class 345 subclass 9]    9Plural image superposition:
 This subclass is indented under subclass 7.  Subject matter wherein at least two visual images* from at least two display devices*, respectively, are superimposed by some light-affecting means.
(1) Note. Examples of light-affecting means include lenses, mirrors, reflectors, etc.
  
[List of Patents for class 345 subclass 10]    10DATA RESPONSIVE CRT DISPLAY CONTROL:
 This subclass is indented under the class definition.  Subject matter including means for controlling a cathode-ray tube to display visual image data*.

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180,for light pen for CRT display.
418+,for significant structure of a data processor or computer architecture wherein elements of computation or data processing techniques are used in connection with a CRT creation or manipulation of s:graphic objects or text performed by a computer or processor in connection with a CRT.

SEE OR SEARCH CLASS:

313, Electric Lamp and Discharge Devices,   subclasses 364+ for structure of the cathode-ray tube.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 8.51+ and 169.1+ for a CRT system and a CRT signal control means with no selective data control of display elements.
348, Television,   appropriate subclasses for a display of television or of video, with receiver related electronic generation and control of an image of the channel to which the receiver is tuned.
  
[List of Patents for class 345 subclass 11]    11CRT provides display control:
 This subclass is indented under subclass 10.  Subject matter wherein the control means includes a CRT for driving a second CRT, the second CRT providing the visual image data* to be displayed.
(1) Note. Display systems which include a first CRT, used as part of a driving circuit and not providing the resultant display, for driving a second CRTproviding the resultant display is found herein.
  
[List of Patents for class 345 subclass 12]    12Data responsive deflection and intensity control:
 This subclass is indented under subclass 10.  Subject matter wherein the control means controls both the electron beam"s deflection and its intensity.

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13+,for data responsive deflection control for a CRT.
20+,for data responsive intensity control for a CRT.
589through 605, for intensity control for a generic display device.

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315, Electric Lamp and Discharge Devices: Systems,   subclasses 364+ and 383+ for CRT deflection circuits and intensity control wherein no selective data control of display elements is provided.
  
[List of Patents for class 345 subclass 13]    13Data responsive deflection control:
 This subclass is indented under subclass 10.  Subject matter in which the control means is responsive to input data or an input message and affects the images by controlling electron beam"s deflection in the CRT.

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315, Electric Lamp and Discharge Devices: Systems,   subclasses 364+ for CRTdeflection circuits.
  
[List of Patents for class 345 subclass 14]    14X and Y axis deflection control:
 This subclass is indented under subclass 13.  Subject matter wherein the electron beam"s deflection is controlled in both horizontal and vertical directions in the CRT.
  
[List of Patents for class 345 subclass 15]    15Curvilinear deflection control (e.g., lissajous):
 This subclass is indented under subclass 13.  Subject matter in which the control means generates a complex waveform which includes some frequency and its harmonics with varying phases whereby the image may be built up by a circular or curvilinear deflection.
  
[List of Patents for class 345 subclass 16]    16Stroke or vector:
 This subclass is indented under subclass 13.  Subject matter wherein the image includes a straight line produced from an input data which may represent terminal points or a point with magnitude and direction.
  
[List of Patents for class 345 subclass 17]    17Strokes for forming characters:
 This subclass is indented under subclass 16.  Subject matter wherein the strokes formed on the CRT result in the generation of alphanumeric* data.

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26,for a character generator used with a CRT.
194,for a character generator used with a generic display device.
467through 472.3, for a character display on a generic display device.
  
[List of Patents for class 345 subclass 18]    18Up/down counter:
 This subclass is indented under subclass 16.  Subject matter including a means for determining the points of the stroke or vector in incremental steps.

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377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,   appropriate subclasses for counters in general.
  
[List of Patents for class 345 subclass 19]    19Impedance array:
 This subclass is indented under subclass 13.  Subject matter in which the control means includes an arrangement of impedances for controlling the electron beam"s deflection.
  
[List of Patents for class 345 subclass 20]    20Data responsive intensity control:
 This subclass is indented under subclass 10.  Subject matter in which the control means is responsive to input data or an input message and controls the brilliance of an image on the CRT.

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63,for fluid light-emitter matrix-type display device with intensity control.
77,for electroluminescent matrix-type display device with intensity control.
589through 605, for intensity control for a generic display device.

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315, Electric Lamp and Discharge Devices: Systems,   subclasses 383+ for CRT intensity control wherein no selective data control of display elements is provided.
  
[List of Patents for class 345 subclass 21]    21Magnetic element array:
 This subclass is indented under subclass 20.  Subject matter including a plurality of magnetic element means providing the brilliance information to the CRT.
  
[List of Patents for class 345 subclass 22]    22Color display:
 This subclass is indented under subclass 10.  Subject matter wherein the visual image* contains more than two colors to be displayed on the CRT.

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72,for fluid light-emitter matrix color display.
83,for solid body light-emitter color display.
88,for liquid crystal color display.
589through 605, for selectable color attributes or for color surface detail/characteristics relating to a visual image to be displayed by a generic display device.
  
[List of Patents for class 345 subclass 23]    23Graphic and alphanumeric display:
 This subclass is indented under subclass 10.  Subject matter wherein the control means selectably provides an image representative of an object (e.g., a plane, boat, etc.) and of a font of alphanumeric* characters on the CRT.

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24,for a graphic CRT display.
25,for an alphanumeric CRT display.
440through 472.3, for a character and graphical display on a generic display device.
  
[List of Patents for class 345 subclass 24]    24Graphic display:
 This subclass is indented under subclass 10.  Subject matter wherein the control means selectably provides an image representative of an object (e.g., a plane, boat, etc.) on the CRT.

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440through 472.3, for a graphical display on a generic display device.
660through 671, for graphical image size control.
  
[List of Patents for class 345 subclass 25]    25Alphanumeric display:
 This subclass is indented under subclass 10.  Subject matter wherein the control means selectably provides an image of a font of alphanumeric* characters on the CRT.

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467through 472, for a character display on a generic display device.
660through 671, for alphanumeric image size controlling.
672through 688, for alphanumeric image scrolling.

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340, Communications: Electrical,   subclasses 815.53+ for lighted alphanumeric visual indicator.
  
[List of Patents for class 345 subclass 26]    26Character generator:
 This subclass is indented under subclass 25.  Subject matter wherein the control means includes a storage means used as a source of the alphanumeric* characters.

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194,for a character generator used with a generic display device.
467through 472, for a character display on a generic display device.
  
[List of Patents for class 345 subclass 27]    27Combined with storage means:
 This subclass is indented under subclass 10.  Subject matter wherein the control means includes a means to retain or to store data elements being applied to the CRT.

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507+,for a memory system in connection with computer display processing hardware.

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365, Static Information Storage and Retrieval,   appropriate subclasses for static storage systems using visible light for the retrieval of stored information instead of for the display of a selected image.
369, Dynamic Information Storage or Retrieval,   appropriate subclasses for dynamic storage systems using visible light for the retrieval of stored information instead of for the display of a selected image.
711, Electrical Computers and Digital Processing Systems: Memory,   appropriate subclasses for memory addressing, accessing and controlling.
  
[List of Patents for class 345 subclass 28]    28Addressing:
 This subclass is indented under subclass 27.  Subject matter including a means for assigning storage locations to the data elements.

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81,for optical addressing of an electroluminescent display.
188,for addressing with priority a multi-plane color memory which stores image data for a computer s:graphics processing system.
193,for addressing a character memory which stores image data for a computer graphics processing system.
515,for addressing a bit map or graphic memory which stores image data for a computer graphics processing system.
516,for addressing circuitry in combination with a display store to be used in conjunction with a computer s:graphics processing system.
  
[List of Patents for class 345 subclass 29]    29Delay line:
 This subclass is indented under subclass 10.  Subject matter wherein the control means has a delay means for synchronizing operations of circuits in the control means.
(1) Note. The delay line may have selective parallel inputs and a serial output.
  
[List of Patents for class 345 subclass 30]    30PLURAL PHYSICAL DISPLAY ELEMENT CONTROL SYSTEM (E.G., NON-CRT):
 This subclass is indented under the class definition.  Subject matter wherein the light-generating or light-controlling display elements* are provided as an arrangement of plural segmented and matrix display elements* or as a flat panel array with selective electrical control.

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40, Card, Picture, or Sign Exhibiting,   appropriate subclasses for mechanical indicia carrying changeable displays.
116, Signals and Indicators,   appropriate subclasses for mechanical indicators.
313, Electric Lamp and Discharge Devices,   subclasses 484+ for gaseous discharge mediums with no selective electrical driving control circuitry, subclasses 498+ for solid-state type discharge mediums with no selective electrical driving control circuitry.
315, Electric Lamp and Discharge Devices: Systems,   appropriate subclasses for gaseous and solid-state type discharge mediums having circuits without selective electrical control as to which of the display elements are to be energized.
340, Communication: Electrical,   subclasses 815.4+ for visual indicators of some condition or state with nonselective electrical display control