PATENTS   
Patents > Guidance, Tools, and Manuals >> Classification >>> Class Definition
    Class Numbers & Titles   | Class Numbers Only   | USPC Index   | International   | HELP  
You are viewing a Class definition.

 [Search a list of Patent Appplications for class 340]   CLASS 340,COMMUNICATIONS: ELECTRICAL
Click here for a printable version of this file

SECTION I - CLASS DEFINITION

This is the residual home for subject matter, not elsewhere classified, relating to communication by means which are in part or in whole electrical.

Communications is defined, for the purpose of this definition, as being the handling of information or intelligence and is not restricted to the conveying of said information or intelligence between geographically spaced points. (Thus, a traffic obstruction light which merely marks a safety island is a means for communicating information or intelligence, viz., the fact of the presence of the traffic island).

Information or intelligence is defined, for the purpose of this definition, as being the subject matter which is handled by signaling systems or signaling devices (such as telegraph systems) or by that portion of nonsignaling systems or nonsignaling devices (such as power supply systems) which is designated in the arts as having a control function (such as the supervisory circuits which control the circuit breakers of an electric power network).

Handling, as used above, is defined as being the active coaction between the tangible communication system or device and the intangible information or intelligence, and such coaction may assume various forms, such as transmission, storage, exhibiting, etc.

(1) Note. Since Class 340 takes, under the class definition, only those electrical communication systems which are not elsewhere classified, the search, in order to be complete, must, in appropriate instances, extend elsewhere. See Lines With Other Classes, below.
(2) Note. The combination of the subject matter of this class (340) and art environment is generally classified with the art environment where that environment is significant, either by virtue of a significant disclosed relationship or by virtue of a claimed relationship. Where the art environment is recited by name only, the combination may be classified, in some instances, with the art environment, and in others, in this class (340). For a list of some of the other classes which contain pertinent subject matter, see the classes referred to under SEARCH CLASS.
(3) Note. This classification was produced in 1952 by making official the unofficial digests which had been established by the Examiners of Division 42 during the period from about 1910 to about 1942. A caveat is given: While it is believed that the titles and definitions are reasonably correct, no assurance can be given that all of the patents, issued prior to the date of reclassification, are in the proper subclass, since the individual patents were not read during the reclassification project. Consequently, in making a thorough search in this class, it is advisable to investigate every subclass which may possibly be pertinent and not, in order to shorten the search, to rely on the principle of superiority of subclass subject matter because of position in schedule, since the principle is applicable only in classes where each patent has been analyzed and placed in the schedule in accordance with that portion of the disclosed subject matter which is claimed.

SECTION II - LINES WITH OTHER CLASSES AND WITHIN THIS CLASS

Since Class 340 takes, under the class definition, only those electrical communication systems which are not elsewhere classified, the search, in order to be complete, must, in appropriate instances, extend to Class 178, Class 246, Class 250, Class 332, Class 343, Class 346, Class 348, and Class 379. See References to Other Classes, below.

LINE BETWEEN CLASSES 116, 250, 340, AND 343

Class 250, Radiant Energy, for signaling systems of the radiant energy type. Such signaling systems are coextensively classified in Class 343, and the class definitions of these two classes should be consulted for the line between Classes 250 and 343, and the class definition of Class 343 for the line between Classes 343 and 116. Note that Class 340 provides for telemetering along a radiant energy beam and for signaling systems having a radiant energy responsive detector.

LINE BETWEEN CLASSES 342, 250, 340, AND 343

Class 342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation) appropriate subclasses for signaling systems of the radio wave energy type. See the reference to Class 250, supra, for the lines between Classes 250, 340, and 343. See Class 343 for antennas with a signal, indicator, or alarm which is responsive to the scan, sweep, or orientation of the antenna; and for antennas with a signal, indicator, or alarm responsive to some other condition of the antenna. See subclass 700 of Class 343 for certain classification lines involving antennas and signals, indicators, and alarms.

SECTION III - SUBCLASS REFERENCES TO THE CURRENT CLASS

SEE OR SEARCH THIS CLASS, SUBCLASS:

901,through 996, The following conventions will apply to the definition of these subclasses: (a) A signal is an information-carrying wave; (b) A indicator is a device which makes information concerning a condition available. (c) An alarm is an indicator which makes information available only upon the occurrence of a preselected state of the condition.
289,320, for a significantly recited electric signaling system.
533,538, 288, and 310.11 for the combination of a Class 340 system and a Class 178 system.

SECTION IV - REFERENCES TO OTHER CLASSES

SEE OR SEARCH CLASS:

15, Brushing, Scrubbing, and General Cleaning,   subclass 339 for brushing, scrubbing and general cleaning machines having a signal or indicator to indicate the condition of the machine or work.
34, Drying and Gas or Vapor Contact With Solids,   subclass 89 for apparatus of that class combined with indicating or signaling means.
40, Card, Picture, or Sign Exhibiting,   subclasses 463+ for electrically actuated changeable exhibitors, such as the advertising display type and subclasses 541+ for illuminated signs having significant sign structure in addition to electric illumination. Advertising display elements arranged in matrix are in class (345) subclasses 55+.
43, Fishing, Trapping, and Vermin Destroying,   subclass 16 , 17, and 58 for the subject matter of that class combined with signals and indicators.
70, Locks,   subclass 434 for locks combined with electric recorders for indicating the previous condition of the lock, and other appropriate subclasses for locks combined with electric signals.
73, Measuring and Testing,   appropriate subclasses for testing devices which make a test of the Class 73 type (usually nonelectrical and nonchemical) and signal the result of said test by electrical means. Note particularly subclasses 23.2+ , 301, 304, 308, 313, 717+, 723+, 733+, and 753+.
81, Tools,   subclass 479 for torque-responsive wrenches or screwdrivers having electrical means to indicate when a selected torque is exerted.
84, Music,   subclass 405 for xylophones with electric action, subclass 407 for bell sets (carillons) with electric action and subclass 462 for electric devices responsive to playing of a musical instrument for recording the action of said instrument.
99, Foods and Beverages: Apparatus,   subclass 285 for beverage infusers having signal means and subclasses 342+ for cookers having signal means.
100, Presses,   subclass 99 for presses having electrical means to indicate the condition of the press or the material being pressed.
109, Safes, Bank Protection, or a Related Device,   subclasses 38+ for safes and analogous structures having alarm devices for signaling loss of integrity.
114, Ships,   subclass 246 for indicators for locating the position of a towed vessel with respect to the towing vessel.
116, Signals and Indicators, see Lines With Other Classes and Within This Class,   in the class definition for the line between the electrical signals in Class 340 and the mechanical signals in Class 116. Search appropriate subclasses of Class 116 for mechanical signals and indicators analogous to the electrical signals and indicators of Class 340. Search subclass 20 for helios:graphic signaling along a light ray.
118, Coating Apparatus,   subclasses 712+ for coating apparatus having a signal or indicator.
119, Animal Husbandry,   subclasses 14.14+ for milkers having a signal or indicator.
134, Cleaning and Liquid Contact With Solids,   subclass 113 for cleaning or wetting devices having signals or indicators.
137, Fluid Handling,   subclasses 551+ for fluid handling equipment having signal or indicating means.
160, Flexible or Portable Closure, Partition, or Panel,   subclass 10 for the subject matter of that class having signals or indicators.
169, Fire Extinguishers,   subclasses 19+ for fire extinguishing systems having automatically opened valves and subclass 23 for fire extinguishing systems having alarms which indicate some abnormal condition of the fire extinguishing system. The nominal combination of a fire extinguishing system, recited nonsignificantly, as by name only, and a significantly recited electric signaling system is classified in appropriate subclasses of Class 340, (for which see Subclass References to the Current Class above)
174, Electricity: Conductors and Insulators,   subclass 11 for fluid-insulated conductors having means to indicate the condition of the fluid.
177, Weighing Scales,   subclasses 45+ for a weigher having an alarm or signal.
178, Telegraphy,   appropriate subclasses for telegraphic signaling. See the class definition of Class 178 for the line between Classes 178 and 340. The combination of a Class 340 system and a Class 178 system is classified in Class 340 in appropriate subclasses, see Subclass References to the Current Class above.
181, Acoustics,   subclasses 101+ for mechanical compressional wave devices and systems, such as those used in seismic prospecting, subclasses 123+, for mechanical sound echo systems, and subclass 125 for mechanical sound location apparatus and methods.
182, Fire Escape, Ladder, or Scaffold,   subclass 18 for a fire escape, ladder, or scaffold having an indicator, signal or alarm.
185, Motors: Spring, Weight, or Animal Powered,   subclass 14 , 36, and 44 for spring and weight motors having indicators to show the extent to which they are wound up or run down.
187, Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle,   appropriate subclasses for signalling means in combination or limited to use with elevator structure.
188, Brakes,   appropriate subclasses for significantly claimed brakes or brake systems combined with signals.
194, Check-Actuated Control Mechanisms,   subclasses 302+ for coin controlled mechanisms having a signal to indicate the condition (e.g., counterfeit coin) of the mechanism.
198, Conveyors: Power-Driven,   subclass 40 for conveyors having signaling means.
200, Electricity: Circuit Makers and Breakers,   subclass 308 for switches having indicators to indicate the position or condition of the switch.
215, Bottles and Jars,   subclasses 365+ for receptacles having indicating means and subclasses 201+, 227, and 230 for closures having indicating means.
219, Electric Heating,   subclass 109 for a current supply indicator (e.g., a recorder, etc.) to a metal heating (e.g., resistance heating, etc.) pressure bonding (e.g., resistance welding, etc.) apparatus, subclass 209 combined with a diverse-type electrical art device, subclass 248 for a heating device combined with a sole plate-type pressure application means (e.g., a flatiron, etc.) including a condition-responsive indicator, subclass 269 for an igniter-type resistive element indicating means, subclass 445.1 for an exposed planar support surface for material to be heated (e.g., hot plate, etc.) including an indicator, subclasses 446.1+ for an exposed planar support surface for material to be heated (e.g., hot plate, etc.) including a sensing means, subclass 487 for a heating device having a power supply and voltage or current regulation or current control means to control or regulate plural separate distinct heating resistance elements (i.e., one control system for all elements, etc.) selectively, sequentially, or alternately including indicator means, subclass 506 for a heating device having automatic regulating or control of power supply and voltage including signal or indicator means, subclass 667 for a condition responsive temperature load sensing power switching supply system for an inductive heating device, subclass 714 for a remote control system for a microwave heating device, subclass 719 for a timer control system for a microwave heating device, or subclass 720 where a control system for a microwave heating device has a display or alarm.
221, Article Dispensing,   subclasses 2+ for article dispensers not otherwise classified having indicators or signals.
222, Dispensing,   subclasses 23+ for fluent material dispensing means having indicators or signals.
232, Deposit and Collection Receptacles,   subclasses 34 through 37for letter boxes having signals or indicators.
234, Selective Cutting (e.g., Punching),   subclasses 4+ for a typographical punching machine provided with means to indicate approach to and entry into the justification zone; subclasses 13+ and 22+, for a selective cutting machine with automatic control usually initiated by an indicator or detector of a given operating condition; subclasses 59+, for a pattern-controlled selective cutting machine which may be electrically operated.
235, Registers,   subclass 61 for mechanical calculators, subclasses 400+ for ordnance control data calculators, subclasses 419+ for electromechanical or mechanical record controlled calculators, subclasses 435+ for coded record sensors, and subclasses 487+ for coded records adapted to be read by machine.
241, Solid Material Comminution or Disintegration,   subclass 101.01 for the subject matter of that class having signals and indicators.
242, Winding, Tensioning, or Guiding,   subclass 357 , 472.0+, 479.9+, 484.8, 484.9+, 534+, 563+, and 912 for a detector, signal, or indicator associated with winding or unwinding an elongated material.
246, Railway Switches and Signals,   for railway signaling and control systems. See the class definition of Class 246 for the line between Classes 246 and 340.
250, Radiant Energy,   for signaling systems of the radiant energy type; subclasses 306+ for methods and apparatus for inspecting solids or liquids by charged particles, subclasses 330+ for the detection of infrared patterns and the conversion of the pattern into a light image, subclasses 336.1+ for methods and apparatus to detect and indicate the intensity or frequency of invisible radiation or the testing of materials by detecting and indicating the change in invisible radiation caused by the material, and subclasses 200 to 239 for photocell light-responsive circuits and apparatus. (See Lines With Other Classes and Within This Class)
258, Railway Mail Delivery,   subclass 2 for the subject matter of that class (which includes delivery to and from airborne vehicles) having signaling features.
276, Typesetting,   subclass 11 for typesetting machines having means for indicating the length of the line set.
291, Track Sanders,   subclass 17 for track and vehicle sanding machines provided with alarms to indicate the operation thereof.
307, Electrical Transmission or Interconnection Systems,   appropriate subclasses for the subject matter of that class having signals and indicators. Note that many of the systems of this class, while not having signals and indicators, have automatic controls which are analogous to signals.
312, Supports: Cabinet Structure,   subclasses 234+ for cabinets having indicators.
313, Electric Lamp and Discharge Devices,   subclass 10 for electric space discharge devices, such as vacuum tubes, or electric lamps having temperature indicators.
314, Electric Lamp and Discharge Devices: Consumable Electrodes,   subclass 9 for electric arc lamps having a signal or indicator.
315, Electric Lamp and Discharge Devices: Systems,   subclasses 129+ for electric gas discharge device systems or electric lamp systems having signals, indicators or alarms and subclasses 364+ for space discharge devices testing or lamp testing equipment having signals or indicators.
318, Electricity: Motive Power Systems,   subclass 490 for electric motor systems having signals or indicators.
320, Electricity: Battery or Capacitor Charging or Discharging,   appropriate subclass for a battery or capacitor charging or discharging circuit combined with an indicator.
322, Electricity: Single Generator Systems,   subclass 99 for electric generator systems having signals or indicators.
324, Electricity: Measuring and Testing,   appropriate subclasses for testing systems for making tests of electric properties having means to indicate the result of the test. Note subclasses 323+ for testing systems for locating ore bodies having means to indicate the result of the test, and subclasses 76.11+ for meters for measuring a property of an electric current or voltage or combination thereof (e.g., power factor, watt-hours, phase angle frequency). Telemetering systems which utilize a meter as a portion thereof are in Class 340 subclasses 870.02+, but the meter subcombination, per se, is classified with the meters of Class 324. Telemetering systems which, by significantly claimed structure or circuit, indicate the result of an electrical test at a point remote from the point of measurement are classified with the test in Class 324, as such telemetering systems are not of general utility, but are restricted to use in Class 324 measurements.
329, Demodulators,   for demodulators of modulated intelligence including continuous waves (CW), and which furnish something more than the mere indication of the initiation of the signal.
331, Oscillators,   appropriate subclasses, for electric oscillation generators of utility in the communication systems of Class 340. Class 331, subclass 64 for oscillator systems provided with an indicator, signal or alarm.
332, Modulators,   subclass 118 and 150 for modulators having signals and indicators.
333, Wave Transmission Lines and Networks,   for wave transmission systems wherein electromagnetic wave energy is guided or constrained by a propagation medium of appreciable electrical length as compared to the wavelength of the propagated energy. This class includes numerous networks and components useful in communications. Note particularly subclass 20 for wave-shaping networks of the passive type, subclasses 24+ for coupling networks including delay networks and filters, and subclasses 236+ for long lines having distributed electrical parameters, and subclasses 1+ for plural channel systems of these lines and networks.
336, Inductor Devices,   subclass 45 for inductors having movable parts and means to indicate the position of the movable part.
338, Electrical Resistors,   subclasses 13+ and 68+ for variable resistors including rheostats and potentiometers.
341, Coded Data Generation or Conversion,   appropriate subclasses for code conversion, transmission or generation.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar,   Radio Navigation) appropriate subclasses for signaling systems of the radio wave energy type. (See Lines With This Class and Within Other Classes.)
345, Computer Graphics Processing and Selective Visual Display Systems,   subclasses 1.1 through 3.4for plural display systems, and subclasses 418-475 for computer graphics processing.
346, Recorders,   appropriate subclasses for signals or indicators which record, and subclass 16 and 17+ for recorders combined with signals and indicators.
348, Television,   appropriate subclasses for television communication systems.
356, Optics: Measuring and Testing,   for visible light type testing and examination instruments particularly for light radar devices in subclasses 3+ , subclasses 43+ for optical pyrometers, subclass 625 for measuring dimension, subclass 388 for configuration comparison devices, subclass 402 for shade or color test devices, subclasses 213+ for photometers, and subclasses 237.1+ for flaw and imperfection devices.
358, Facsimile and Static Presentation Processing,   appropriate subclasses for data processing for static presentation to printer, and facsimile communication systems.
360, Dynamic Magnetic Information Storage or Retrieval,   appropriate subclass for read/write dynamic storage systems.
362, Illumination,   appropriate subclasses for illuminating means which may serve as signalling means.
365, Static Information Storage and Retrieval,   appropriate subclass for read/write static storage systems, subclasses 185.01+ for floating gate memory storage (e.g., flash memory).
367, Communications, Electrical: Acoustic Wave Systems and Devices,   for electrical communication systems in which the intelligence communicated is transmitted in part as acoustic wave energy.
368, Horology: Time Measuring Systems or Devices,   subclasses 46+ for electric systems which indicate time and for electric clocks.
370, Multiplex Communications,   appropriate subclasses for multiplexing systems.
374, Thermal Measuring and Testing,   subclasses 163+ for a thermometer with an electrical heat sensor and a quantitative signalling arrangement.
377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,   subclasses 112+ for electrical counters with display or indication.
380, Cryptography,   subclasses 255 through 276for a communication system using cryptography.
381, Electrical Audio Signal Processing and Systems,   appropriate subclasses for one-way audio signal transmission and audio signal processing systems.
396, Photography,   subclasses 429+ for a camera combined with diverse art devices.
400, Typewriting Machines,   appropriate subclasses for typewriters having signals to indicate the condition or operation of the machine. Note particularly subclasses 70+ .
404, Road Structure, Process, or Apparatus,   subclasses 9+ for nonelectric roadway structure designed to direct traffic.
406, Conveyors: Fluid Current,   subclasses 34+ for conveyors having signals or indicators.
422, Chemical Apparatus and Process Disinfecting, Deodorizing, Preserving, or Sterilizing,   subclasses 50+ or 105+ for chemical apparatus having means to electrically signal a condition of said apparatus or the result of a chemical test.
429, Chemistry: Electrical Current Producing Apparatus, Product, and Process,   subclasses 90+ for battery having measuring, testing, or indicating means.
434, Education and Demonstration,   subclasses 327+ for educational appliances which have a question and hidden answer, some of which signal a correct answer and subclasses 112+ for machines by which a blind person can read printed material, said machine furnishing signals which are a coded representation of the printed material.
441, Buoys, Rafts, and Aquatic Devices,   subclasses 6+ for floating buoys utilized for marine navigation.
446, Amusement Devices: Toys,   appropriate subclasses for various electric and magnetic toys which utilize electric signals, particularly subclass 142 , 242, 454, and 484+.
505, Superconductor Technology: Apparatus, Material, Process,   subclasses 150+ for high temperature (Tc > 30 K) superconducting devices, and particularly subclasses 182+ for light responsive system or subclass 202 for electric communication system.
600, Surgery,   subclasses 300+ for electric diagnostic devices having signals or indicators.
700, Data Processing: Generic Control Systems or Specific Applications,   subclasses 1 through 89for generic data processing control systems, particularly subclass 18 for programming methods or procedures; and subclasses 90-306 for particular application of data processing systems or calculating computers.
702, Data Processing: Measuring, Calibrating, or Testing,   appropriate subclasses for measuring, testing, or calibrating system having significant data processing.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,   subclasses 200+ for artificial intelligence systems that process speech signals.
706, Data Processing: Aritifical Intelligent,   various subclasses for artificial intelligence systems that represent, apply, and acquire knowledge.
708, Electrical Computers: Arithmetic Processing and Calculating,   subclasses 1+ for hybrid computers; subclasses 100+ for digital calculating computers, and subclasses 800+ for analog computers.
709, Electrical Computers and Digital Processing Systems: Multicomputer or data transferring,   appropriate subclassesfor data transfer among multiple computer systems.
714, Error Detection/Correction and Fault Detection/Recovery,   subclasses for apparatus and corresponding processes relating to generic error detection or correction, or fault detection or recovery.

SUBCLASSES

[List of Patents for class 340 subclass 2.1]    2.1Path selection:
 This subclass is indented under subclass 825.  Subject matter having a plurality of alternative communication channels and selection of less than the total number of channels for signal transmission.

SEE OR SEARCH CLASS:

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits and Systems,   subclasses 365 through 508for miscellaneous gating circuits which switch input to output.
370, Multiplex Communications,   subclasses 351 through 430for apparatus or technique for locating a route through a switching network wherein two or more simultaneous information signals are conveyed.
379, Telephonic Communications,   subclasses 219 through 241for plural exchange network or interconnection and subclasses 242-332 for centralized telephone switching system.
710, Electrical Computers and Digital Data, Processing Systems: Input/Output,   subclasses 100 through 132for system intraconnecting, and particularly subclasses 131 and 132 for path selection and switching (e.g., crossbar switching) in a digital data processing system.
  
[List of Patents for class 340 subclass 2.2]    2.2Channel selecting matrix:
 This subclass is indented under subclass 2.1.  Subject matter wherein a communication line is selected using a two or more dimensional array of electrical elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14.1through 14.69, for a decoder matrix.
  
[List of Patents for class 340 subclass 2.21]    2.21Plural stages:
 This subclass is indented under subclass 2.2.  Subject matter including multiple levels of plural matrices to form a path through all successive levels.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.27,for plural matrices in general, subclass 2.6 for plural stage path selection in general, and subclass 14.2 for plural stage decoder matrix.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclass 388 for apparatus or technique for locating a route through a multistage switching network wherein two or more simultaneous information signals are conveyed.
  
[List of Patents for class 340 subclass 2.22]    2.22Clos type:
 This subclass is indented under subclass 2.21.  Subject matter wherein the multiple levels are arranged in a nonblocking manner.
(1) Note. A nonblocking matrix is one that always has an available path between a particular input and a particular output.
  
[List of Patents for class 340 subclass 2.23]    2.23Alternate routing:
 This subclass is indented under subclass 2.2.  Subject matter wherein the path through the plural stage matrix system may be modified upon failure of connection between the desired input and output line.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclasses 225 through 228for multiplex fault recovery with inoperative channel bypassing.
  
[List of Patents for class 340 subclass 2.24]    2.24Having master control element:
 This subclass is indented under subclass 2.21.  Subject matter including a supervisory element which controls a plural stage matrix.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.26,for channel selecting matrix having master control element in general.
  
[List of Patents for class 340 subclass 2.25]    2.25Folded:
 This subclass is indented under subclass 2.2.  Subject matter wherein inputs and outputs of the two or more dimensional array are on the same side of the array.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclass 361 for apparatus or technique for locating a route through a folded switching network wherein two or more simultaneous information signals are conveyed.
  
[List of Patents for class 340 subclass 2.26]    2.26Having master control element:
 This subclass is indented under subclass 2.2.  Subject matter including a supervisory element that controls a two or more dimensional array.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.24,for plural stage channel selecting matrix having master control element.
  
[List of Patents for class 340 subclass 2.27]    2.27Plural matrices:
 This subclass is indented under subclass 2.2.  Subject matter including multiple, interconnected, two or more dimensional arrays of electrical elements.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.21through 2.24, for plural stage communication matrices.
  
[List of Patents for class 340 subclass 2.28]    2.28Crosspoint switch detail (i.e., specific crosspoint):
 This subclass is indented under subclass 2.2.  Subject matter wherein the matrix element is a specific type of switch used to make a connection for signal transmission.
  
[List of Patents for class 340 subclass 2.29]    2.29Semiconductor:
 This subclass is indented under subclass 2.28.  Subject matter wherein the crosspoint element has a conductivity intermediate that of conductors and insulators.

SEE OR SEARCH THIS CLASS, SUBCLASS:

14.6through 14.69, for a semiconductor crosspoint decoder matrix.
  
[List of Patents for class 340 subclass 2.31]    2.31Gas discharge:
 This subclass is indented under subclass 2.28.  Subject matter wherein the crosspoint element comprises a gas discharge tube.

SEE OR SEARCH CLASS:

313, Electric Lamp and Discharge Devices,   subclasses 567 through 643for gas discharge device detail.
  
[List of Patents for class 340 subclass 2.4]    2.4Code or pulse responsive:
 This subclass is indented under subclass 2.1.  Subject matter wherein the channel selection is performed in response to a specified pulse pattern or pulse.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.57through 825.69, for pulse-responsive selective systems, in general.
  
[List of Patents for class 340 subclass 2.5]    2.5Wiper:
 This subclass is indented under subclass 2.1.  Subject matter wherein a movable electric contact (e.g., a rheostat) is used to establish a channel for signal transmission.

SEE OR SEARCH CLASS:

338, Electrical Resistors,   subclass 68 201 for a mechanically variable type resistor (e.g., rheostat), per se.
  
[List of Patents for class 340 subclass 2.6]    2.6Plural stages:
 This subclass is indented under subclass 2.1.  Subject matter including multiple levels of selectors which are used to establish a path through all successive levels for signal transmission.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.21through 2.24, for a plural stage channel selecting matrix, and 14.2 for a plural stage decoder matrix.
  
[List of Patents for class 340 subclass 2.7]    2.7Condition of data channel:
 This subclass is indented under subclass 2.1.  Subject matter wherein selection of a channel is based upon the operational condition of system elements.
  
[List of Patents for class 340 subclass 2.71]    2.71Hunting:
 This subclass is indented under subclass 2.7.  Subject matter wherein a search is performed to find a route that is not currently used.
  
[List of Patents for class 340 subclass 2.8]    2.8Data channel selector line:
 This subclass is indented under subclass 2.1.  Subject matter wherein a separate line is used to communicate which of the plurality of possible channels is currently selected for signal transmission.
  
[List of Patents for class 340 subclass 3.1]    3.1Monitoring in addition to control (e.g., supervisory):
 This subclass is indented under subclass 825.  Subject matter wherein a signal representative of the actual status of the controlled device, with respect to an intended controlled function, is transmitted back to the selective signal source.
(1) Note. For classification herein, there must be at least a controller, a sensor, and a controlled device. If only a single controlled device is present, it must exhibit plural functions. Also present must be a control signal and a status signal.
(2) Note. A controller is also called a central or master station.

SEE OR SEARCH CLASS:

700, Data Processing: Generic Control Systems or Specific Applications,   subclasses 1 through 89for a data processing generic control system, apparatus, or process in general, particularly subclasses 9 and 10 for supervisory control in a data processing generic control system, apparatus, or process; and subclasses 90-306 for a data processing specific application, apparatus, or process, particularly subclasses 95-212 for product assembly or manufacturing data processing (especially subclass 169 for supervisory machining control) and subclass 241 for central control of plural dispensing units.
  
[List of Patents for class 340 subclass 3.2]    3.2Synchronization:
 This subclass is indented under subclass 3.1.  Subject matter including a reference timing function for operating plural system components.
(1) Note. The reference timing function often includes a clock-pulse generator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.2,825.21, for such subject matter absent monitoring and control

SEE OR SEARCH CLASS:

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 141 through 163for miscellaneous signal synchronizing.
368, Horology: Time Measuring Systems or Devices,   subclass 47 for wireless synchronization in a plural timepiece system or system device.
370, Multiplex Communications,   appropriate subclasses for synchronization in multiplex communication and particularly subclasses 503 through 520for synchronizing where information is combined or distributed via time channels.
375, Pulse or Digital Communications,   subclasses 354 through 376for pulse or digital communication with synchronization.
713, Electrical Computers and Digital Processing Systems: Support,   subclass 400 and 401 for synchronization of clock or timing signals, data, or pulses in digital processing systems.
  
[List of Patents for class 340 subclass 3.21]    3.21Time slot or packet:
 This subclass is indented under subclass 3.2.  Subject matter wherein the reference timing function includes data frame timing signals such as preamble, header, or frame sync code.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   appropriate subclasses for multiplex communications using time slots or packets.
  
[List of Patents for class 340 subclass 3.22]    3.22Electromechanical (e.g., relay, rotary distributor):
 This subclass is indented under subclass 3.2.  Subject matter wherein the reference timing function includes a mechanical movable element responsive to electrical input such as a relay or rotary distributor.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.8,for monitoring and control utilizing an electromechanical relay in general.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 2 through 204for electromagnetically actuated switches, per se.
361, Electricity: Electrical Systems and Devices,   subclasses 160 through 210for a relay or solenoid control circuit, per se.
  
[List of Patents for class 340 subclass 3.23]    3.23Relay chain:
 This subclass is indented under subclass 3.22.  Subject matter wherein the movable element includes a series of successively connected relay or counter stages.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.65through 825.67, for counting in pulse responsive actuation absent monitoring and control.
  
[List of Patents for class 340 subclass 3.24]    3.24Step-by-step:
 This subclass is indented under subclass 3.22.  Subject matter wherein the movable element is actuated in accordance with a number of transmitted signals or impulses.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.41,825.42, for selective step-by-step impulse party line having indication or alarm and absent monitoring and control.
  
[List of Patents for class 340 subclass 3.3]    3.3Including storage or recording:
 This subclass is indented under subclass 3.1.  Subject matter combined with the production of a permanent or semipermanent record of a control or representative signal.
(1) Note. The term "record" is not limited to a tangible object, but includes a stored pattern in a static storage device (e.g., magnetic core matrix).

SEE OR SEARCH CLASS:

346, Recorders,   appropriate subclasses for recorders, per se.
360, Dynamic Magnetic Information Storage or Retrieval,   appropriate subclasses for dynamic information storage and retrieval which utilizes a magnetic medium.
365, Static Information Storage and Retrieval,   appropriate subclasses for static information storage and retrieval (e.g., memory device).
369, Dynamic Information Storage or Retrieval,   appropriate subclasses for dynamic information storage and retrieval in general.
711, Electrical Computers and Digital Processing Systems: Memory,   appropriate subclasses for digital processing memory including addressing, accessing, and control thereof.
  
[List of Patents for class 340 subclass 3.31]    3.31Storage at controlled device or sensor:
 This subclass is indented under subclass 3.3.  Subject matter wherein the record is located at either the controlled device or the source of the change in status signal.
  
[List of Patents for class 340 subclass 3.32]    3.32Storage at controller:
 This subclass is indented under subclass 3.3.  Subject matter wherein the record is located at a central station.
  
[List of Patents for class 340 subclass 3.4]    3.4Quiescent:
 This subclass is indented under subclass 3.1.  Subject matter wherein the representative signal is transmitted solely in response to a change in condition.
  
[List of Patents for class 340 subclass 3.41]    3.41Collision avoidance:
 This subclass is indented under subclass 3.4.  Subject matter wherein a protocol is utilized to prevent a transmitting device from interfering with another transmitting device.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclass 462 for channel access arbitration in multiplex communication.
  
[List of Patents for class 340 subclass 3.42]    3.42Control to avoid fault:
 This subclass is indented under subclass 3.1.  Subject matter wherein a control signal is sent to the controlled device to prevent a malfunction.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclasses 216 through 228for fault recovery in multiplex communication systems.
700, Data Processing: Generic Control Systems or Specific Applications,   subclasses 90 through 306for a data processing specific application, apparatus, or process, particularly subclasses 108-111 for performance monitoring in a data processing application of product assembly and manufacturing.
  
[List of Patents for class 340 subclass 3.43]    3.43Fault condition detection:
 This subclass is indented under subclass 3.1.  Subject matter which produces a representative signal in response to a malfunction of the selective device.
(1) Note. The term "malfunction" is intended to include disagreement between intended and actual controlled function.

SEE OR SEARCH CLASS:

324, Electricity: Measuring and Testing,   subclasses 500 through 556for fault detecting in electrical circuits and components.
370, Multiplex Communications,   subclasses 216 through 228for fault recovery in multiplex communication systems.
700, Data Processing: Generic Control Systems or Specific Applications,   subclasses 90 through 306for a data processing specific application, apparatus, or process, particularly subclasses 108-111 for performance monitoring in a data processing application of product assembly and manufacturing.
714, Error Detection/Correction and Fault Detection/Recovery,   appropriate subclasses for error detection/correction, in general.
  
[List of Patents for class 340 subclass 3.44]    3.44Control to correct fault:
 This subclass is indented under subclass 3.43.  Subject matter wherein a control signal is sent to the controlled device to correct a malfunction.
  
[List of Patents for class 340 subclass 3.5]    3.5Including addressing:
 This subclass is indented under subclass 3.1.  Subject matter with a plurality of controlled devices, each of which is responsive to a specific signal so as to permit individual control.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.52,825.53, for addressing absent a representative signal.

SEE OR SEARCH CLASS:

700, Data Processing: Generic Control Systems or Specific Applications,   subclass 23 for sequence program response addressing in a selective or sequential data processing generic control system, apparatus, or process.
711, Electrical Computers and Digital Processing Systems: Memory,   subclasses 200 through 221for generalized address forming in a digital data processing system.
  
[List of Patents for class 340 subclass 3.51]    3.51Polling or roll call:
 This subclass is indented under subclass 3.5.  Subject matter wherein all of the controlled devices will transmit a representative signal in response to a particular signal.
(1) Note. The transmission of the representative signals may be done in succession.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10.1through 10.6, for interrogation response.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclass 346 for polling in time channel multiplex free space communication, subclasses 449-457 for multiplex channel assignment polling techniques, and art collection FOR 164 for polling in time division variable channel assignment.
379, Telephonic Communications,   subclasses 92.01 and 92.02 for polling in a telephone system in combination with a diverse electrical system and art collection FOR 114 for polling in a telephone system in combination with a diverse electrical system.
710, Electrical Computers and Digital Data Processing Systems: Input/Output,   subclass 44 for prioritized polling for I/O access, subclasses 46 and 47 for I/O polling in general, subclass 109 for bus polling access regulation, subclasses 113-118 for centralized bus prioritizing, subclasses 119-125 for decentralized bus prioritizing, and subclass 220 for generalized access polling in a digital data processing system.
  
[List of Patents for class 340 subclass 3.52]    3.52Group address:
 This subclass is indented under subclass 3.5.  Subject matter wherein the specific signal uniquely identifies multiple devices.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclass 312 for a free space multiplex message addressed to multiple destinations and subclass 390 for a replicate packet multiplexed message for multiple destination distribution.
  
[List of Patents for class 340 subclass 3.53]    3.53Source address:
 This subclass is indented under subclass 3.5.  Subject matter wherein the specific signal uniquely identifies its origin.
  
[List of Patents for class 340 subclass 3.54]    3.54Destination address:
 This subclass is indented under subclass 3.5.  Subject matter wherein the specific signal uniquely identifies a device which is to receive and act on the signal.
  
[List of Patents for class 340 subclass 3.55]    3.55Pulse counting:
 This subclass is indented under subclass 3.54.  Subject matter wherein pulse tallying is utilized in forming the destination address.

SEE OR SEARCH CLASS:

377, Electrical Pulse Counters, Pulse Dividers, or Shift Registers: Circuits and Systems,   appropriate subclasses for pulse counters, in general.
  
[List of Patents for class 340 subclass 3.6]    3.6Scanning:
 This subclass is indented under subclass 3.1.  Subject matter having plural controlled devices with successive transmission of representative signals from each of the controlled devices.
(1) Note. It is generally assumed that each device can use the transmission media during an assigned time slot.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   appropriate subclasses for multiplex communication, in general, utilizing time channels or slots.
  
[List of Patents for class 340 subclass 3.61]    3.61Continuous:
 This subclass is indented under subclass 3.6.  Subject matter wherein the scanning is automatically restarted at its conclusion.
  
[List of Patents for class 340 subclass 3.62]    3.62Interrupted:
 This subclass is indented under subclass 3.6.  Subject matter having structure to interrupt the normal scanning sequence.
(1) Note. Such interruption may be for the purpose of obtaining an indication of a particular controlled device.
  
[List of Patents for class 340 subclass 3.63]    3.63Automatic:
 This subclass is indented under subclass 3.62.  Subject matter wherein the interruption is in response to a predetermined representative signal.
  
[List of Patents for class 340 subclass 3.7]    3.7Including indicator:
 This subclass is indented under subclass 3.1.  Subject matter having an element which produces a humanly perceptible signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

384.1through 404.3, for an audible indicator, per se.
407.1through 407.2, for a tactual indicator, per se.
815.4through 815.92, for a visual indicator, per se.
825.36through 825.49, for selective communication having an indication or alarm in general.

SEE OR SEARCH CLASS:

700, Data Processing: Generic Control Systems or Specific Applications,   subclasses 1 through 89for a data processing generic control system, apparatus, or process in general, particularly subclass 27 for sequence program response status indication in a data processing sequential or selective generic control system, apparatus, or process.
  
[List of Patents for class 340 subclass 3.71]    3.71Having manual control input:
 This subclass is indented under subclass 3.7.  Subject matter wherein a user manually inputs a control signal correlated to an indicator.

SEE OR SEARCH CLASS:

700, Data Processing: Generic Control Systems or Specific Applications,   subclasses 1 through 89for a data processing generic control system, apparatus, or process in general, particularly subclasses 17 and 18 for an operator interface in a data processing sequential or selective generic control system, apparatus, or process.
  
[List of Patents for class 340 subclass 3.8]    3.8Electromechanical relay:
 This subclass is indented under subclass 3.1.  Subject matter having an electromechanical relay.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.22through 3.24, for synchronization in monitoring and control utilizing an electromechanical relay.

SEE OR SEARCH CLASS:

335, Electricity: Magnetically Operated Switches, Magnets, and Electromagnets,   subclasses 2 through 204for electromagnetically actuated switches, per se.
361, Electricity: Electrical Systems and Devices,   subclasses 160 through 210for a relay or solenoid control circuit, per se.
  
[List of Patents for class 340 subclass 3.9]    3.9Control then monitoring:
 This subclass is indented under subclass 3.1.  Subject matter wherein the status signal is an indication of the status of the function being controlled.
(1) Note. The status signal is generally a confirmation of whether the controlled function has been completed.
  
[List of Patents for class 340 subclass 5.1]    5.1Intelligence comparison for controlling:
 This subclass is indented under subclass 825.  Subject matter which compares an information bearing item or signal with an information reference, and performing a control function in accordance with the comparison.
(1) Note. System controlled by data bearing record (e.g., credit card) having significantly claimed data bearing record feature or record sensing is excluded herein, see search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.1,for paging to control diverse device.

SEE OR SEARCH CLASS:

70, Lock,   appropriate subclases for mechanical locking systems and devices.
235, Registers,   subclasses 375 through 386for systems controlled by data bearing records (e.g., credit card); subclasses 435-486 for coded record sensors; and subclasses 487-495 for data bearing records, per se.
327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclass 1 for signal discriminating having comparison without subsequent control.
714, Error Detection/Correction and Fault Detection/Recovery,   subclasses 735 through 737for computer error comparison wherein operational condition is determined by comparing device response to various criteria.
  
[List of Patents for class 340 subclass 5.2]    5.2Authorization control (e.g., entry into an area):
 This subclass is indented under subclass 5.1.  Subject matter wherein the comparison determines operation of a controlled device to permit an individual to perform an action.
(1) Note. Lock with significant mechanical structure is excluded from this subclass, see search note below.

SEE OR SEARCH CLASS:

70, Locks,   appropriate subclasses for mechanical locking systems and devices.
235, Registers,   subclass 382 for similar subject matter where entry is controlled by a data bearing record.
348, Television,   subclass 156 for observation of or from a specific location (e.g., surveillance) by a camera to permit entrance or exit of an authorized person or vehicle.
399, Electrophotography,   subclass 366 for document handling of unauthorized copy prevention..
463, Amusement Devices: Games,   subclass 29 for access or authorization (e.g., game selection, security, etc.) in a data processing game apparatus.
705, Data Processing, Financial, Business Practice, Management, or Cost/Price Determination,   subclass 44 for credit processing requiring authorization.
  
[List of Patents for class 340 subclass 5.21]    5.21Varying authorization:
 This subclass is indented under subclass 5.2.  Subject matter wherein the comparison is based on a changeable verification logic or data.

SEE OR SEARCH CLASS:

235, Registers,   subclass 382.5 for credit or identification card system having an arrangement to modify date required for permitting access.
  
[List of Patents for class 340 subclass 5.22]    5.22Code learning:
 This subclass is indented under subclass 5.21.  Subject matter wherein the comparison is based on a presettable or calculated control code.
(1) Note. Authorization control by password, or I.D. in a computerized control dispensing or vending system is excluded from this subclass, see search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.26,for varying authorization by code rotating or scrambling.
5.51,for authorization control by manual code input.
5.6,for authorization control by coded record input (e.g., IC card or key).
10.51through 10.52, for transponder programming.

SEE OR SEARCH CLASS:

341, Coded Data Generation or Conversion,   subclass 78 for a programmable code converter apparatus.
700, Data Processing: Generic Control Systems or Specific Applications,   subclass 237 , for authorization control by password, or I.D. in a computerized control dispensing or vending system.
  
[List of Patents for class 340 subclass 5.23]    5.23Programming from coded record to controller:
 This subclass is indented under subclass 5.22.  Subject matter wherein authorization control data stored in a controller (e.g., lock) is defined or modified in response to a received code from a data bearing record or carrier.
(1) Note. This subclass includes updating or programming of codes in a lock using key or card input.
  
[List of Patents for class 340 subclass 5.24]    5.24Using additional record or carrier code:
 This subclass is indented under subclass 5.23.  Subject matter wherein a first set of data bearing record or carrier code is changed using a second set of data bearing record or carrier code during programming of authorization control data.
(1) Note. This subclass includes system where a second key or card code is required to authorize programming of a first code.
  
[List of Patents for class 340 subclass 5.25]    5.25Programming of coded record:
 This subclass is indented under subclass 5.22.  Subject matter wherein the presettable or calculated code is stored in a programmable data bearing record or carrier (e.g., electronic key or card ).
(1) Note. This subclass includes updating or programming a code stored on a key or card.
  
[List of Patents for class 340 subclass 5.26]    5.26Code rotating or scrambling:
 This subclass is indented under subclass 5.21.  Subject matter wherein the comparison is based on a control code or key that is effected by a counter/timer control means or an encryption/decryption algorithm for an adequate security purpose.
(1) Note. Security system having significantly claimed cryptography technique without a control code or key is excluded herein, see search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.22,for varying authorization control by code learning.
5.51,for authorization control by manual code input.
5.6,for authorization control by coded record input (e.g., IC card or key).

SEE OR SEARCH CLASS:

380, Cryptography,   subclasses 255 through 276for communication system using cryptography.
902, Electronic Funds Transfer,   subclass 2 for encryption or decryption of transmitted data in a fund transfer system.
705, Data Processing: Financial, Business Practice, Management, or Cost/Price Determination,   subclasses 50 through 80for business processing using cryptography.
713, Electrical Computers and Digital Processing Systems: Support,   subclasses 150 through 184for multiple computer communication using cryptography, subclasses 182-186 for system access control based on user identification by cryptography, subclass 187 for program modification detection by cryptography, subclass 188 for computer virus detection by cryptography, subclass 189 for data processing using cryptography.
  
[List of Patents for class 340 subclass 5.27]    5.27Rule based input:
 This subclass is indented under subclass 5.21.  Subject matter wherein the comparison is based on a desired pattern of user responses to queries.
(1) Note. Mere data recall responsive to query is excluded from this subclass, see search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

10.1through 10.6, for interrogation response.

SEE OR SEARCH CLASS:

706, Data Processing: Artificial Intelligence,   subclass 47 for a knowledge processing system using rule-based reasoning method.
  
[List of Patents for class 340 subclass 5.28]    5.28Timed access blocking:
 This subclass is indented under subclass 5.2.  Subject matter wherein the comparison allows the action to be performed to occur during specified period.

SEE OR SEARCH THIS CLASS, SUBCLASS:

309.16through 309.9, for a timed controlled communication system.
528,for time delay entry/exit.

SEE OR SEARCH CLASS:

49, Movable or Removable Closures,   subclass 29 for time controlled closures.
70, Locks,   subclasses 272 through 274for clockwork control operating mechanism, and Dig 45 for time lock and auxiliary lock operable on failure of time lock.
368, Horology: Time Measuring Systems or Devices,   appropriate subclasses.
  
[List of Patents for class 340 subclass 5.3]    5.3Having indication of improper access:
 This subclass is indented under subclass 5.2.  Subject matter which additionally produces a signal indicative of an invalid access attempt.
(1) Note. Included herein is alarm and logging of successful and unsuccessful comparisons and tamper indication.
(2) Note. Indication without access control is excluded from this subclass, see search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

287through 309, for a signal box alarm arrangement, particularly subclass 288 for alarm transmission over a power line.
426.1through 426.36, for vehicle alarms or indication of burglary or unauthorized use.
541through 567, for an intrusion responsive indicator or alarm.

SEE OR SEARCH CLASS:

49, Movable or Removable Closures,   subclasses 13 through 14for closure condition indicator.
70, Locks,   subclasses 432 through 441and Dig. 49 for Locks with indicator or alarm.
109, Safes, Bank Protection, or a Related Device,   subclass 21 for bank protection device with alarm or indicator, subclass 31 for art device combined with fluent material distributing, generating device for alarm or indicator, subclass 38 for combined art device with alarm or indicator.
116, Signals and Indicators,   subclass 6 for burglar alarm and subclass 33 for vehicle theft prevention.
348, Television,   subclass 152 for intrusion detection by a television camera.
379, Telephonic Communications,   subclass 37 for emergency or alarm communications (e.g., watchman s circuit), particularly subclass 39 for responsive to sensed nonsystem condition, external to the telephone system, and subclasses 106.01-106.11 for remote condition indication, other than an emergency or alarm condition, over a telephone line.
  
[List of Patents for class 340 subclass 5.31]    5.31Lockout or disable:
 This subclass is indented under subclass 5.3.  Subject matter wherein the produced indicative signal causes a preventive condition of the operation of the controlled device (e.g., inacccessible or inoperative).

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.7through 5.73, for access barrier
5.74,for access to electrical information.

SEE OR SEARCH CLASS:

123, Internal-Combustion Engines,   subclass 179.4 for condition responsive control of starting device including automatic engine stop, subclass 333 for engine speed reduction for fuel cutoff.
180, Motor Vehicles,   subclass 279 and 283 for circuit interruption of vehicle motor or ignition circuit for safety of the vehicle.
307, Electrical Transmission or Intercommunication Systems,   subclasses 10.3 through 10.5for vehicle ignition or starting circuit lock.
379, Telephonic Communications,   subclasses 188 through 200for call restriction from a particular station, or for alerting signal generation in response to a call or call attempt in violation of a call restriction.
  
[List of Patents for class 340 subclass 5.32]    5.32Visual indication:
 This subclass is indented under subclass 5.3.  Subject matter wherein the produced indicative signal is visually perceptible.

SEE OR SEARCH THIS CLASS, SUBCLASS:

815.4through 815.92, for specific visual indication communication system and method.

SEE OR SEARCH CLASS:

345, Computer Graphics Processing and Selective Visual Display Systems,   subclass 618 for display indication of an unusual status (e.g., an alarm indication via an icon or a change in color based on an unusual condition, etc.).
  
[List of Patents for class 340 subclass 5.33]    5.33Including link to a remote indicator:
 This subclass is indented under subclass 5.3.  Subject matter comprising means for communicating the produced indicative signal to a distant indicator.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.18,for plural controlled devices by input from a central location.
5.25through 5.27, for wireless transceiver in a coded record input authorization control system.
5.28,for wireless transmitter in a coded record authorization control system.
531through 539.32 , for a condition responsive indicating system having particular link between sensing and indicating means.
541through 567, for intrusion detection alarm.
568.1through 572.9, for article placement or removal alarms.

SEE OR SEARCH CLASS:

49, Movable or Removable Closure,   subclass 14 for closure condition indicator at remote station.
379, Telephonic Communications,   subclass 106.01 for remote indicator over telephone line.
  
[List of Patents for class 340 subclass 5.4]    5.4Credit:
 This subclass is indented under subclass 5.2.  Subject matter wherein a comparison is made with a balance in an individual"s account so as to permit or deny immediate receipt of a desired product.
(1) Note. Significant data processing system for credit transaction is excluded from this subclass. See search notes below.

SEE OR SEARCH CLASS:

235, Registers,   subclasses 380 through 382.5for credit card operated registers having significant card reading structure.
379, Telephonic Communications,   subclasses 91.01 through 91.02for credit authorization in a combined telephone system.
463, Amusement Devices: Games,   subclass 25 for access or authorization (e.g., game selection, security, etc.) in a data processing game apparatus controlled by available credit.
705, Data Processing: Financial, Business Practice, Management, or Cost/ Price Determination,   subclass 38 and 39-45 for a computer data processing for credit transaction system with insignificant communication feature.
902, Electronic Funds Transfer,   appropriate subcollections for a cross-reference art collection of disclosures of fund transfer systems.
  
[List of Patents for class 340 subclass 5.41]    5.41Banking or financing:
 This subclass is indented under subclass 5.4.  Subject matter wherein the desired product is associated with a business administration which plans the disposition or use of fund, security, extension of credit, or loan.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.26through 825.27, for stock quotation.

SEE OR SEARCH CLASS:

235, Registers,   subclass 379 for controlled data bearing record in a banking system.
705, Data Processing, Financial, Business Practice, Management, or Cost/ Price Determination,   subclasses 35 through 45for a computer data processing in a banking or financing application.
  
[List of Patents for class 340 subclass 5.42]    5.42Debiting (e.g., rental):
 This subclass is indented under subclass 5.4.  Subject matter wherein an amount is substracted from a positive balance to permit receipt of the desired product.

SEE OR SEARCH CLASS:

455, Telecommunications,   subclass 409 for usage measurement for rental telephone.
  
[List of Patents for class 340 subclass 5.5]    5.5Input from central location for plural controlled devices:
 This subclass is indented under subclass 5.2.  Subject matter wherein more than one device is being controlled by signal inputted from a central station.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.14,for a remote indicator of an improper access.
5.25through 5.27, for coded record input device having wireless transceiver for remote control.
5.28,for coded record input device having wireless transmitter for remote control.

SEE OR SEARCH CLASS:

49, Movable or Removable Closures,   subclasses 15 through 20for jail type closure with remote control, subclass 24 for individually controlled closures with master control, subclass 25 for closure with radiant energy control, subclasses 29-30 for time controlled closure, subclass 31 for condition responsive control.
70, Locks,   subclass 264 for central control, Dig 16 for jail door lock.
379, Telephonic Communications,   subclass 102.02 for remote control of a device that has the primary function of receiving or transmitting information.
  
[List of Patents for class 340 subclass 5.51]    5.51Manual code input:
 This subclass is indented under subclass 5.2.  Subject matter wherein the information bearing signal is generated by input from a user.
(1) Note. The input may includes, for example, information picked up from a device worn by a user, or user input information, etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.22,for authorization control in which control code is programmed.
5.26,for authorization control wherein control code is varied by rotating or scrambling technique.
5.6,for authorization by coded record input (e.g., IC card or key).

SEE OR SEARCH CLASS:

341, Coded Data Generation or Conversion,   appropriate subclasses for code converter, code generator, or code transmitter system or method per se, particularly subclasses 22 through 34for bodily actuated code generator including keyboard or keypad.
  
[List of Patents for class 340 subclass 5.52]    5.52Biometrics:
 This subclass is indented under subclass 5.51.  Subject matter wherein the information bearing signal is generated from data specific to a user s body.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.82through 5.84, for an authentication system in which body characteristic is used for verification or identification.

SEE OR SEARCH CLASS:

382, Image Analysis,   subclasses 115 through 127for personal identification including biometrics.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,   subclasses 246 through 250for voice recognition, subclass 273 for speech signal processing in a security system.
902, Electronic Funds Transfer,   subclass 3 for electronic funds transfer system having means for analyzing physical characteristic of user (e.g., fingerprint, handprint).
  
[List of Patents for class 340 subclass 5.53]    5.53Image (e.g., fingerprint , face):
 This subclass is indented under subclass 5.52.  Subject matter wherein the data specific to a user s body is a pattern picturing a part of the user s body.
(1) Note. The pattern, can be a digital representation of the body part.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.4,for an authentication system in which image of user body characteristic is used for verification or identification.

SEE OR SEARCH CLASS:

382, Image Analysis,   subclass 115 for image or pattern analyzing for recognizing a person.
  
[List of Patents for class 340 subclass 5.54]    5.54Password:
 This subclass is indented under subclass 5.51.  Subject matter wherein the information bearing signal comprises user identification code for security purpose.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.85,for an authentication system in which user identification number is used for verification or identification

SEE OR SEARCH CLASS:

700, Data Processing: Generic Control Systems or Specific Applications,   subclass 225 for data processing article handling system having identification code, subclasses 221-222 for identification code in a plural articles handling data processing system; subclass 237 for password authorization in a computerized dispensing or vending apparatus.
705, Data Processing: Financial, Business Practice, Management, or Cost/ Price Determination,   subclass 18 for a point of sale terminal having security or user identification provision (password entry, etc.).
711, Electrical Computers and Digital Processing Systems: Memory,   subclass 164 for memory access control by password or key.
726, Information Security,   subclasses 1 through 30for information security in computers or digital processing system.
902, Electronic Funds Transfer,   subclass 5 for electronic funds transfer having means to enter personal identification numbers.
  
[List of Patents for class 340 subclass 5.55]    5.55Rotary input:
 This subclass is indented under subclass 5.51.  Subject matter wherein the information bearing signal comprises input from a dial or code wheel mechanism.

SEE OR SEARCH CLASS:

70, Locks,   subclass 278.4 for lock with dial input
341, Coded Data Generation or Conversion,   subclass 35 for bodily actuated code generator with rotary dial, subclass 192 for code generator or transmitter with rotary distributor.
  
[List of Patents for class 340 subclass 5.6]    5.6Coded record input (e.g., IC card or key):
 This subclass is indented under subclass 5.2.  Subject matter wherein the information bearing signal is generated from coded data stored in a data bearing record or carrier.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.22through 5.25, for varying authorization by code learning having coded record.
5.26,for varying authorization by code rotating or scrambling.
5.51through 5.55, for authorization control by manual code input.

SEE OR SEARCH CLASS:

49, Movable or Removable Closures,   subclass 35 for check or key controlled closure.
70, Locks,   subclass 278 ,2-278.3 and subclasses 284-285 for key controlled lock.
235, Registers,   subclasses 380 through 382.5for identification card operated registers having significant card reading structure.
  
[List of Patents for class 340 subclass 5.61]    5.61Wireless transceiver:
 This subclass is indented under subclass 5.6.  Subject matter comprising a transmitter-receiver device for exchanging information over free space.
(1) Note. The free space is a medium that is not a wire or wave-guide.
(2) Note. For similar subject matter having only one way communication of data. See search notes below.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.33,for a remote indicator of an improper access.
5.5,for plural controlled devices by input from a central location.
5.64,for coded record input device authorization control system including wireless transmitter
10.1through 10.6, for interrogation-response system.
572.1through 572.7, for security tags.

SEE OR SEARCH CLASS:

341, Coded Data Generation or Conversion,   subclass 176 for code generator or transmitter in which the transmitter produces a signal for control of a remotely located device.
  
[List of Patents for class 340 subclass 5.62]    5.62Including manual switching means:
 This subclass is indented under subclass 5.61.  Subject matter comprising a make and break device actuated by user input for
(1) Note. The user input can include proximity detection.

SEE OR SEARCH THIS CLASS, SUBCLASS:

541through 567, for intrusion detection.

SEE OR SEARCH CLASS:

341, Coded Data Generation or Conversion,   subclasses 20 through 35for bodily actuated code generator.
  
[List of Patents for class 340 subclass 5.63]    5.63Including timing means (e.g., clock):
 This subclass is indented under subclass 5.61.  Subject matter wherein the exchange of information is initiated by a timing or clock signal.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.28,for time access blocking.

SEE OR SEARCH CLASS:

70, Locks,   subclasses 272 through 274and Dig. 45 for locks with clock control.
368, Horology: Time Measuring Systems or Devices,   appropriate subclasses.
455, Telecommunications,   subclass 171.1 and 181.1 with time actuated or time controlled receiver for locks with clock control, subclass 231 for lock with local control of receiver operation at specific time intervals.
  
[List of Patents for class 340 subclass 5.64]    5.64Wireless transmitter:
 This subclass is indented under subclass 5.6.  Subject matter comprising a transmission device for sending information over free space
(1) Note. Free space is a medium which is not a wire or wave-guide.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.33,for a remote indicator of an improper access.
5.5,for plural controlled devices by input from a central location.
5.61through 5.63, for coded record input device authorization control system including wireless transceiver.
825.69and 825.72, for selective control responsive to wireless signal.

SEE OR SEARCH CLASS:

123, Internal-Combustion Engines,   subclass 179.2 for remote control of starting device.
318, Electricity: Motive Power Systems,   subclass 16 for radio controlled motors.
341, Coded Data Generation or Conversion,   subclass 176 for code generator or transmitter in which the transmitter produces a signal for control of a remotely located device.
  
[List of Patents for class 340 subclass 5.65]    5.65Electronic coded record:
 This subclass is indented under subclass 5.6.  Subject matter comprising details of electronic circuitry or data processing means of a card or key.

SEE OR SEARCH CLASS:

70, Locks,   Dig. 46 for conducting key.
235, Registers,   subclasses 441 through 443for electric contact sensors, subclass 492 for conductive records.
257, Active Solid-State Devices (e.g., Transistors,   Solid-State Diodes) subclass 679 for smart card package.
  
[List of Patents for class 340 subclass 5.66]    5.66Magnetic coded record:
 This subclass is indented under subclass 5.6.  Subject matter comprising details of magnetic element (e.g., magnetic card key decoder, magnetic card key, etc.) of a card or key.

SEE OR SEARCH CLASS:

235, Registers,   subclasses 449 through 450for magnetic sensors, subclass 493 for magnetic records.
  
[List of Patents for class 340 subclass 5.67]    5.67Mechanical coded record:
 This subclass is indented under subclass 5.6.  Subject matter comprising details of mechanical structure (e.g., mechanical key, mechanical key decoder, etc.) of a card or key.
(1) Note. System with significant mechanical lock structure is excluded from this subclass. See search notes below.

SEE OR SEARCH CLASS:

70, Locks,   subclasses 278.2 through 278.3and subclasses 284-285 for key controlled lock, subclasses 336-340 for key operated locks.
235, Registers,   subclasses 444 through 448for electromechanical sensor, subclass 453 for mechanical sensor, subclasses 458-460 for optical sensing of perforated record, subclass 489 for perforated record.
  
[List of Patents for class 340 subclass 5.7]    5.7Access barrier:
 This subclass is indented under subclass 5.2.  Subject matter wherein the action performed is a control of an element for opening or closing an entrance.
(1) Note. The element includes, for example, a door.

SEE OR SEARCH CLASS:

49, Movable or Removable Closures,   appropriate subclasses, subclasses 15 through 20for jail type closures with similar latching devices.
52, Static Structures (e.g., Buildings),   for closures and related structure provided in that class
53, Package Making,   subclasses 329 through 366for package structure having closure securing means.
70, Locks,   subclass 271 for operating mechanism of time controlled electric lock, and subclasses 277-283.1 for operating mechanism of electric locks.
105, Railway Rolling Stock,   appropriate subclasses for closures associated with both passenger and freight cars
109, Safes, Bank Protection, or a Related Device,   subclasses 6 through 8for plural closures used as a trapping mechanism, subclasses 11-18 for a protective shield movable from a retracted position to an operative position, and subclasses 64 -77 for a movable closure combined with a safe or like structure.
187, Elevator, Industrial Lift Truck, or Stationary Lift for Vehicle,   subclasses 313 through 335for a barrier in combination with other elevator structure which regulates access to or from an elevator car and subclasses 336.
292, Closure Fasteners,   subclass 144 , 201, 341.16 for various type of fasteners with motors, subclass 342 for means for closing an elevator shaft opening through a landing.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),   appropriate subclasses for closures associated with both passenger and freight cars
361, Electricity: Electrical Systems and Devices,   subclass 172 for code responsive operated relays or solenoids.
379, Telephonic Communications,   subclass 102.06 for remote control over telephone line for permitting or preventing physical entrance or exit lock.
  
[List of Patents for class 340 subclass 5.71]    5.71Garage door:
 This subclass is indented under subclass 5.32.  Subject matter wherein the element is a vehicle gate.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.64,for authorization control using wireless transmitter.

SEE OR SEARCH CLASS:

70, Locks,   dig. 11 for garage door locks.
318, Electricity: Motive Power Systems,   subclass 16 for radio controlled motors.
  
[List of Patents for class 340 subclass 5.72]    5.72Vehicle door:
 This subclass is indented under subclass 5.7.  Subject matter wherein the element is an automotive door.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.31,for vehicle disabling due to improper access.
5.64,for authorization control using wireless transmitter.

SEE OR SEARCH CLASS:

70, Locks,   subclasses 237 through 260for vehicle locks.
180, Motor Vehicles,   subclasses 287 through 290for preventing unauthorized access of motor vehicle.
296, Land Vehicles: Bodies and Tops,   particularly subclasses 146.1 through 146.16for doors and windows.
307, Electrical Transmission or Interconnection Systems,   subclasses 10.1 through 10.5for automotive anti-theft system.
701, Data Processing: Vehicles, Navigation, and Relative Location,   subclass 49 for vehicle equipment position control (e.g., seat, mirror, door, window, headrest or headlamp).
  
[List of Patents for class 340 subclass 5.73]    5.73Lockbox:
 This subclass is indented under subclass 5.7.  Subject matter wherein the element is for a safety deposit box .
(1) Note. This subclass includes real estate lock boxes.

SEE OR SEARCH THIS CLASS, SUBCLASS:

542,for detection of unauthorized or improper operation of locking device.

SEE OR SEARCH CLASS:

70, Lock,   appropriate subclasses for mechanisms associated with locks or their operating features, particularly subclass 63 for receptacles.
109, Safes, Bank Protection, or a Related Device,   subclasses 45 through 49for safety deposit boxes and their compartments.
222, Dispensing,   subclasses 153.01 through 153.14for locks combined with dispensing devices.
  
[List of Patents for class 340 subclass 5.74]    5.74Access to electrical information:
 This subclass is indented under subclass 5.2.  Subject matter wherein the individual is authorized to obtain information or data signal.
(1) Note. This subclass excludes significant computer for data processing for access control. See search class notes below.

SEE OR SEARCH CLASS:

360, Dynamic Magnetic Information Storage or Retrieval,   subclass 60 for preventing recording or erasing an earlier recording on a record carrier.
380, Cryptography,   subclasses 201 through 209for copy protection or prevention of video signal by cryptography.
439, Electrical Connectors,   subclasses 133 through 134for unauthorized connection prevention.
455, Telecommunications,   subclass 26.1 for use or access blocking of a modulated carrier wave communication in general and subclass 411 for radiotelephone with privacy or lockout.
463, Amusement Devices: Games,   subclass 29 for access or authorization.
705, Data Processing: Financial , Business Practice, Management, or Cost/Price Determination,   subclasses 50 through 80for business cryptography.
708, Electrical Computers: Arithmetic Processing and Calculating,   subclass 135 for security.
707, Data Processing: Database and File Management or Data Structures,   subclasses 1 through 206for database or file management systems including significant addressing, retrieval, or manipulation of information contained within a database of a digital data processing system or computer including searching, query processing, information locating and retrieval techniques from a file or database.
711, Electrical Computers and Digital Processing Systems,   subclasses 100 through 173for storage accessing and control, subclass 163 for access limiting and subclass 164 for access with password or key.
713, Electrical Computers and Digital Processing Systems: Support,   subclasses 182 through 186for system access control based on user identification by cryptography.
726, Information Security,   subclasses 1 through 30for information security in computers or digital processing system.
  
[List of Patents for class 340 subclass 5.8]    5.8Authentication (e.g., identity):
 This subclass is indented under subclass 5.1.  Subject matter which compares characteristics or data to determine proper validation of a user, object, or document.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.1through 5.92, for similar subject matter in authorization systems.

SEE OR SEARCH CLASS:

235, Registers,   subclass 380 for identification card systems where the card is a data bearing record.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),   subclasses 44 through 45for identification system.
348, Television,   subclass 161 for the remote verification of signatures using television and having an operator making a decision as to the authenticity of the signature, where a television system is an integral part of the system.
356, Optics: Measuring and Testing,   subclass 71 for optical document verification.
380, Cryptography,   subclasses 23 through 25for an authentication system using encrypted transmission.
399, Electrophotography,   subclass 12 for unit or part identification.
705, Data Processing, Financial, Business Practice, Management, or Cost/ Price Determination,   subclass 44 for a computerized arrangement for transferring funds by debiting one account and crediting another by the same amount in which an approval is required prior to effecting a funds transfer, or subclass 67 for secure transaction cryptographic processing (e.g., EFT/ POS) including authentication.
713, Electrical Computers and Digital Processing Systems: Support,   subclasses 155 through 159for multiple computer communication using cryptography having central trusted authority providing computer authentication, subclass 161 for multiple computer communication using cryptography where packet header denotes cryptographically protected data and having data authentication, and subclasses 168-181 for multiple computer communication using cryptography having particular communication authentication technique.
  
[List of Patents for class 340 subclass 5.81]    5.81Personal identification:
 This subclass is indented under subclass 5.8.  Subject matter wherein identity of an individual is validated.
(1) Note: This subclass usually pertains to system which identify an individual, and the controlled function is generally an indication of the authenticity.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.3through 5.33, for authorization control with indication of improper access

SEE OR SEARCH CLASS:

283, Printed Matter,   subclasses 75 through 78for personal identification.
382, Image Analysis,   subclasses 115 through 127for image analyzing for the purpose of recognizing an individual or verifying a person"s identity.
434, Education and Demonstration,   subclass 155 for identification of person or handwriting analysis.
  
[List of Patents for class 340 subclass 5.82]    5.82Biometrics:
 This subclass is indented under subclass 5.81.  Subject matter wherein body characteristic is used to validate the identity of the individual.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.52through 5.53, for authorization system controlled by body characteristic.

SEE OR SEARCH CLASS:

348, Television,   subclass 77 for television system adapted for human body observation.
382, Image Analysis,   subclasses 115 through 127for personal identification including biometrics.
396, Photography,   subclasses 14 through 18for eye, mouth or body photography.
902, Electronic Funds Transfer,   subclass 3 for electronic funds transfer system having means for analyzing physical characteristic of user (e.g., fingerprint, handprint).
  
[List of Patents for class 340 subclass 5.83]    5.83Image (e.g., Fingerprint, Face):
 This subclass is indented under subclass 5.82.  Subject matter wherein the body characteristic includes pattern picturing part of the individual s body.
(1) Note. The pattern picturing part of body may be a digital representation.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.53,for authorization system controlled by image (e.g., fingerprint, face).

SEE OR SEARCH CLASS:

382, Image Analysis,   subclass 115 for image or pattern analyzing for recognizing a person.
  
[List of Patents for class 340 subclass 5.84]    5.84Voice:
 This subclass is indented under subclass 5.82.  Subject matter wherein the body characteristic includes the individual s speech

SEE OR SEARCH CLASS:

381, Electrical Audio Signal Processing Systems and Devices,   appropriate subclasses for electrical transmission or processing systems for audio signals.
704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,   subclasses 246 through 250for voice recognition and subclass 273 for security systems including speech signal processing.
  
[List of Patents for class 340 subclass 5.85]    5.85Password:
 This subclass is indented under subclass 5.81.  Subject matter wherein the characteristic includes user identification code for security purpose.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.54,for authorization system controlled by password.

SEE OR SEARCH CLASS:

700, Data Processing: Generic Control Systems or Specific Applications,   subclass 225 for data processing article handling system having identification code, subclasses 221-222 for identification code in a plural articles handling data processing system; subclass 237 for password authorization in a computerized dispensing or vending apparatus.
705, Data Processing: Financial, Business Practice, Management, or Cost/ Price Determination,   subclass 18 for a point of sale terminal having security or user identification provision (password entry, etc.).
711, Electrical Computers and Digital Processing Systems: Memory,   subclass 164 for memory access control by password or key.
713, Electrical Computers and Digital Processing Systems: Support,   subclass 202 for security in computer using password.
902, Electronic Funds Transfer,   subclass 5 for electronic funds transfer having means to enter personal identification numbers.
  
[List of Patents for class 340 subclass 5.86]    5.86Document authentication:
 This subclass is indented under subclass 5.8.  Subject matter wherein validity of a document is determined.

SEE OR SEARCH CLASS:

250, Radiant Energy,   subclasses 559.01 through 559.49for optical inspection of webs.
270, Sheet-Material Associating,   appropriate subclasses for document handling subject matter.
271, Sheet Feeding or Delivering,   appropriate subclasses for related subject matter.
358, Facsimile and Static Presentation Processing,   subclass 488 for system in which the position of a document relative to a platen or scanning apparatus is detected.
380, Crytography,   subclasses 23 through 25for record actuated authentication system.
382, Image Analysis,   subclass 112 for imaging system that inspect webs, such as newspaper, etc., for proper registration of the print thereon or for inspection of the condition of a document for damage (e.g. staining, soiling) to the document.
399, Electrophotography,   subclass 366 for document handling of unauthorized copy prevention.
713, Electrical Computers and Digital Processing Systems: Support,   subclasses 150 through 181for multiple computer communication using cryptography.
  
[List of Patents for class 340 subclass 5.9]    5.9Commodity (e.g., vending):
 This subclass is indented under subclass 5.1.  Subject matter providing for a receipt, dispensation or count of a merchandise.

SEE OR SEARCH CLASS:

70, Locks,   Dig 41 for coin controlled locks.
186, Merchandising,   subclass 3 for store service with selective delivery, subclass 20 for store service with selective switches, subclasses 55-56 for store service with remote item dispensing.
235, Registers,   subclass 381 for vending controlled by a data bearing record.
221, Article Dispensing,   appropriate subclass, in particular subclasses 2 through 8for article dispensing device having recorder, register, indicator, signal or exhibitor.
222, Dispensing,   appropriate subclass, in particular subclasses 23 through 51dispensing process including record, register, indicator or exhibitor.
700, Data Processing: Generic Control Systems or Specific Applications,   subclass 237 for password authorization in a computerized dispensing or vending apparatus
705, Data Processing: Financial, Business Practice, Management, or Cost/Price Determination,   subclasses 16 through 25for vending combined with a cash or credit transaction.
  
[List of Patents for class 340 subclass 5.91]    5.91Including merchandise information display system (e.g., store price display):
 This subclass is indented under subclass 5.9.  Subject matter. comprising means for visually indicating an information related to the merchandise (e.g., price).

SEE OR SEARCH CLASS:

345, Computer Graphics Processing and Selective Visual Display Systems,   appropriate subclasses for computer graphic processing, interfacing, or type of display system.
705, Data Processing: Financial, Business Practice, Management, or Cost/Price Determination,   subclass 20 for price look up including price display in a point of sale terminal and subclasses 400-418 for cost/price determination.
708, Electrical Computers: Arithmetic Processing and Calculating,   subclass 163 for a business calculator having specialized output.
  
[List of Patents for class 340 subclass 5.92]    5.92Item inventorying:
 This subclass is indented under subclass 5.9.  Subject matter includes an arrangement for establishing, maintaining, or updating a record of the merchandise.
(1) Note. An inventory system having significant data processing is classified in an external class. See search class notes below.

SEE OR SEARCH CLASS:

235, Registers,   subclass 385 for system controlled by data bearing record in which a record associated with or representative of an article is sensed, and sensed data is used to compile a record of items on hand.
700, Data Processing: Generic Control Systems or Specific Applications,   subclass 225 for data processing article handling system having identification code, subclass 236 for article handling inventory in a data processing system.
705, Data Processing: Financial, Business Practice, Management, or Cost/Price Determination,   subclass 22 for inventory monitoring in a point of sale terminal, subclasses 28-29 inventory management in a generic business system.
  
[List of Patents for class 340 subclass 7.1]    7.1Paging to control diverse device:
 This subclass is indented under subclass 825.36.  Subject matter wherein a control signal provides commands to control a device in addition to providing a paging indication to a user.

SEE OR SEARCH THIS CLASS, SUBCLASS:

5.1through 5.92, for control in response to an information bearing item, particularly security related control, subclass 825.37 for selective control in addition to indication or alarm, and subclasses 7.2-7.63 for selective paging systems including 7.33-7.36 for power control or battery saving of a selective paging device based on a received signal.
  
[List of Patents for class 340 subclass 7.2]    7.2Code responsive (i.e., paging):
 This subclass is indented under subclass 825.36.  Subject matter wherein the indication at a selective call receiver (SCR) is controlled or actuated in accordance with a predetermined control signal.
(1) Note. These systems are generally characterized by terminals which receive requests for indication (and organize those requests) and transmitter base stations which communicate such a request in the form of a predetermined control signal to a selective call receiver (SCR).
(2) Note. A paging signal generally is the communication between a transmitter base station and an SCR.
(3) Note. SCRs are also known as pagers, paging receivers, or beepers etc.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.1,for paging to control diverse device.
311.2,for nonselective call paging (e.g. public address system).

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclasses 310 through 350for multiplex communication over free space, particularly subclasses 313-314 for specific multiplex communication including a portable address responsive receiver.
375, Pulse or Digital Communications,   appropriate subclasses for a paging device combined with a digital communication system.
379, Telephonic Communications,   subclass 88.15 for telephonic communication including audio message storage, retrieval, or synthesis having multimedia system pager activation and FOR 101 for an art collection related to telephonic communication having electromagnetic link for speech or paging signal (e.g., light wave link).
455, Telecommunications,   particularly foreign /nonpatent literature of subclasses 701 through 703for similar subject matter involving tone coded squelch and subclass 228 for a telecommunications receiver combined with a paging device.
  
[List of Patents for class 340 subclass 7.21]    7.21Two-way paging:
 This subclass is indented under subclass 7.2.  Subject matter wherein the SCR may additionally transmit information back to the paging terminal.
(1) Note. The information transmitted from the SCR to the paging terminal generally is relayed in some manner through the transmitter base station. Ack-Back pagers and Reply pagers are classified here.
  
[List of Patents for class 340 subclass 7.22]    7.22Acknowledgment of message receipt:
 This subclass is indented under subclass 7.21.  Subject matter wherein the response from the pager is an indication that a paging signal has been received by the paging terminal.
  
[List of Patents for class 340 subclass 7.23]    7.23Including reply to query:
 This subclass is indented under subclass 7.22.  Subject matter wherein the response from the pager is an answer to a question posed in the paging signal received by the paging terminal.
  
[List of Patents for class 340 subclass 7.24]    7.24Transmitting configuration:
 This subclass is indented under subclass 7.2.  Subject matter wherein a specific transmitter base station arrangement is used to relay the control signal from the paging terminal to the SCR.
  
[List of Patents for class 340 subclass 7.25]    7.25Multiple transmitters:
 This subclass is indented under subclass 7.24.  Subject matter wherein a plurality of transmitter base stations are used to communicate the control signal to the SCR.
  
[List of Patents for class 340 subclass 7.26]    7.26Simulcast:
 This subclass is indented under subclass 7.25.  Subject matter wherein the plurality of transmitter base stations are synchronized to transmit the same control signal at the same time.
  
[List of Patents for class 340 subclass 7.27]    7.27Zoned:
 This subclass is indented under subclass 7.25.  Subject matter wherein each of a plurality of transmitter base stations is arranged to cover a specific geographical area.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclasses 328 through 338for multiplex communication over free space involving plural contiguous regions.
455, Telecommunications,   subclasses 422.1 through 460for zoned or cellular telephone systems.
  
[List of Patents for class 340 subclass 7.28]    7.28Paging terminal (i.e., element prior to the transmitter):
 This subclass is indented under subclass 7.2.  Subject matter wherein a specific interface between the requesting user and the transmitter base station is used to organize requests and control signals.
  
[List of Patents for class 340 subclass 7.29]    7.29Terminal connected to other network (e.g., Internet):
 This subclass is indented under subclass 7.28.  Subject matter wherein the paging terminal receives requests for indication from a communication system other than just the PSTN.

SEE OR SEARCH CLASS:

379, Telephonic Communications,   subclasses 90.01 through 108.02for a telephone system combined with diverse electrical system or signaling.
709, Electrical Computers and Digital Processing Systems: Multicomputer Data Transferring,   appropriate suclassesfor plural computer communications.
  
[List of Patents for class 340 subclass 7.3]    7.3Queuing:
 This subclass is indented under subclass 7.28.  Subject matter wherein the paging terminal effects the order in which received requests are sent as paging messages to the SCRs.
  
[List of Patents for class 340 subclass 7.31]    7.31Message input:
 This subclass is indented under subclass 7.28.  Subject matter wherein the paging terminal includes devices which are used to generate paging messages based upon received requests.
  
[List of Patents for class 340 subclass 7.32]    7.32Power control or battery saving:
 This subclass is indented under subclass 7.2.  Subject matter wherein the SCR s power consumption is regulated or reduced.

SEE OR SEARCH CLASS:

323, Electricity: Power Supply or Regulation Systems,   appropriate subclasses for generic power supply regulation.
370, Multiplex Communications,   subclass 311 for multiplex signaling for performing battery saving.
455, Telecommunications,   subclasses 127.1 through 127.5for power supply of transmitter, subclass 343.1-343.6 for power supply of receiver, and subclasses 572-574 for power supply of radiotelephone.
713, Electrical Computers and Digital Processing Systems: Support,   subclasses 300 through 340for computer power control.
  
[List of Patents for class 340 subclass 7.33]    7.33Based on received signal:
 This subclass is indented under subclass 7.32.  Subject matter wherein the SCR s power consumption is regulated or reduced in response to a received signal.
  
[List of Patents for class 340 subclass 7.34]    7.34Frame based timing:
 This subclass is indented under subclass 7.33.  Subject matter wherein the power control circuit in the SCR operates in response to timing information derived from received packetized data.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.45,for paging address format in general.
  
[List of Patents for class 340 subclass 7.35]    7.35Address based:
 This subclass is indented under subclass 7.33.  Subject matter wherein the power control circuit in the SCR operates in response to its identifier in a received control signal.
  
[List of Patents for class 340 subclass 7.36]    7.36Received signal includes power command:
 This subclass is indented under subclass 7.32.  Subject matter wherein the received signal includes an instruction to the SCR s power saving circuit.
  
[List of Patents for class 340 subclass 7.37]    7.37Control based upon available power:
 This subclass is indented under subclass 7.32.  Subject matter wherein the SCR s power consumption is regulated or reduced in response to the amount of power remaining in the SCR s power supply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

636.1through 636.21 , for battery condition responsive indicating system.
  
[List of Patents for class 340 subclass 7.38]    7.38Time based:
 This subclass is indented under subclass 7.32.  Subject matter wherein the power control circuit in the SCR is responsive to a fixed time schedule.
  
[List of Patents for class 340 subclass 7.39]    7.39Programming the receiver:
 This subclass is indented under subclass 7.2.  Subject matter wherein a control signal which can be used by the SCR to effect the future operation of the SCR is supplied thereto.
  
[List of Patents for class 340 subclass 7.4]    7.4Via local device:
 This subclass is indented under subclass 7.39.  Subject matter wherein the programming control signal is delivered to the SCR from a nearby device.
  
[List of Patents for class 340 subclass 7.41]    7.41Over the air:
 This subclass is indented under subclass 7.39.  Subject matter wherein the programming control signal is delivered to the SCR via the same communication system as the indication control signals.
  
[List of Patents for class 340 subclass 7.42]    7.42Frequency scanning for address:
 This subclass is indented under subclass 7.2.  Subject matter wherein the SCR scans plural frequencies in search of a message to itself.

SEE OR SEARCH CLASS:

455, Telecommunications,   subclass 434 for cellular access channel scanning.
  
[List of Patents for class 340 subclass 7.43]    7.43Particular message and address format (e.g., POCSAG, FLEX, etc.):
 This subclass is indented under subclass 7.2.  Subject matter wherein a specific protocol is used to communicate a control signal and selecting code.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.45,for particular addressing format.

SEE OR SEARCH CLASS:

341, Coded Data Generation or Conversion,   appropriate subclasses for various types of conversion between codes.
  
[List of Patents for class 340 subclass 7.44]    7.44Having error detection or correction:
 This subclass is indented under subclass 7.43.  Subject matter wherein an error in the communication of the control signal is detected which may be subsequently corrected.
(1) Note. Error correction and error indication are classified here.

SEE OR SEARCH CLASS:

714, Error Detection/Correction and Fault Detection/Recovery,   appropriate subclasses for generic error detection or correction.
  
[List of Patents for class 340 subclass 7.45]    7.45Addressing format:
 This subclass is indented under subclass 7.2.  Subject matter wherein a specific selecting code is used to direct a control signal to a specific SCR.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.34,for power control or battery saving based on address, subclasses 7.43-7.44 for particular message and address format, and subclasses 825.52-825.53 for selective addressing in general.
  
[List of Patents for class 340 subclass 7.46]    7.46Group call:
 This subclass is indented under subclass 7.45.  Subject matter including plural SCRs each actuated by a signal unique thereto, and each also responsive to a signal which actuates a plurality of SCRs.
(1) Note. The group call signal may actuate all or a subset of SCRs in the system.
  
[List of Patents for class 340 subclass 7.47]    7.47Source address:
 This subclass is indented under subclass 7.46.  Subject matter wherein plural indicating devices realize that a message is intended for each indicating device based on a code which designates the sender of the message to be indicated.
  
[List of Patents for class 340 subclass 7.48]    7.48News information provider (e.g., sports, weather, etc.):
 This subclass is indented under subclass 7.46.  Subject matter wherein the user requesting the indication sends or initiates a control signal which indicates the status of a particular newsworthy subject.

SEE OR SEARCH THIS CLASS, SUBCLASS:

825.26through 825.27, for selective stock quotation.
  
[List of Patents for class 340 subclass 7.49]    7.49Tone code (i.e., frequency code):
 This subclass is indented under subclass 7.45.  Subject matter wherein the control signal is a predetermined pattern of successive audio frequency modulated signals.
(1) Note. The successive signals may include one or more frequencies, but a single modulated signal is not classified herein.

SEE OR SEARCH CLASS:

375, Pulse or Digital Communications,   subclass 239 for pulse frequency modulation communication.
  
[List of Patents for class 340 subclass 7.5]    7.5Distress signal:
 This subclass is indented under subclass 7.2.  Subject matter responsive to the receipt of signals having standardized characteristics representing an emergency type situation from any transmitter.
(1) Note. The signals are often indications of nautical vessels in distress, such as the "SOS" or standard international distress signal.
  
[List of Patents for class 340 subclass 7.51]    7.51Message presentation:
 This subclass is indented under subclass 7.2.  Subject matter wherein the indication is a perceptible announcement of information.
(1) Note. Paging alerts are classified elsewhere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.58through 7.62, for paging alerts.

SEE OR SEARCH CLASS:

345, Computer Graphics Processing and Selective Visual Display Systems,   appropriate subclasses for computer graphics display processing.
  
[List of Patents for class 340 subclass 7.52]    7.52Storing or retrieving message (e.g., received message database handling):
 This subclass is indented under subclass 7.51.  Subject matter wherein the message is saved in a memory area for future recall.
(1) Note. Handling or searching stored messages is classified here.

SEE OR SEARCH CLASS:

707, Data Processing: Database and File Management or Data Structures,   appropriate subclasses for generic database management.
  
[List of Patents for class 340 subclass 7.53]    7.53Canned message (audible or visual):
 This subclass is indented under subclass 7.51.  Subject matter wherein a message is communicated in the control signal using a code representing the message (or a portion thereof).
  
[List of Patents for class 340 subclass 7.54]    7.54Via externally coupled device:
 This subclass is indented under subclass 7.51.  Subject matter wherein the message is presented via a separate device connected to the SCR.
  
[List of Patents for class 340 subclass 7.55]    7.55Display:
 This subclass is indented under subclass 7.51.  Subject matter wherein the message is presented via a visual element.

SEE OR SEARCH CLASS:

345, Computer Graphics Processing and Selective Visual Display Systems,   appropriate subclasses for a selective visual display in general.
  
[List of Patents for class 340 subclass 7.56]    7.56Including graphics:
 This subclass is indented under subclass 7.55.  Subject matter wherein the displayed message includes a pictorial image.
(1) Note. Graphics here include icons.

SEE OR SEARCH CLASS:

345, Computer Graphics Processing and Selective Visual Display Systems,   appropriate subclasses for computer graphics.
  
[List of Patents for class 340 subclass 7.57]    7.57Audible:
 This subclass is indented under subclass 7.51.  Subject matter wherein the message is presented using a sound producing element.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.62,for an audible paging alert.
384.1through 404.3, for an electrical audible indicator in general.

SEE OR SEARCH CLASS:

381, Electrical Audio Signal Processing Systems and Devices,   appropriate subclasses for audio signal processing in general.
  
[List of Patents for class 340 subclass 7.58]    7.58Alert:
 This subclass is indented under subclass 7.2.  Subject matter including a humanly perceptible indication that a specific control signal has been received.
  
[List of Patents for class 340 subclass 7.59]    7.59Priority alert:
 This subclass is indented under subclass 7.58.  Subject matter wherein the alert is indicative of the order of importance of the received control signal.
  
[List of Patents for class 340 subclass 7.6]    7.6Vibratory (i.e., tactual) alarm:
 This subclass is indented under subclass 7.58.  Subject matter wherein the indicating element produces a shaking vibration which is felt rather than heard.
(1) Note. The vibration is generally in the subaudible range.

SEE OR SEARCH THIS CLASS, SUBCLASS:

407.1through 407.2, for tactual signals, per se.
  
[List of Patents for class 340 subclass 7.61]    7.61Visual:
 This subclass is indented under subclass 7.58.  Subject matter wherein the alert indicating element produces a visible indication.

SEE OR SEARCH THIS CLASS, SUBCLASS:

815.4through 815.92, for electrical visual indicators in general.
  
[List of Patents for class 340 subclass 7.62]    7.62Audible:
 This subclass is indented under subclass 7.58.  Subject matter wherein the alert indicating element produces a noise that is heard.

SEE OR SEARCH THIS CLASS, SUBCLASS:

7.57,for audible paging message presentation.
384.1through 404.3, for electrical audible indicators in general.
  
[List of Patents for class 340 subclass 7.63]    7.63Housing detail:
 This subclass is indented under subclass 7.2.  Subject matter wherein a specific structure encases the SCR.

SEE OR SEARCH CLASS:

361, Electricity: Electrical Systems and Devices,   subclasses 814 through 815for radio type housings.
455, Telecommunications,   subclass 90.3 for a telecommunication transceiver housing, subclass 128 for a telecommunication transmitter housing, subclasses 347-351 for a telecommunication receiver housing, and subclasses 575.1-575.9 for a radiotelephone housing.
  
[List of Patents for class 340 subclass 10.1]    10.1Interrogation response:
 This subclass is indented under 825.  having an information containing device and an information source control device for querying the information containing device, with the expectation of an immediate reply.

SEE OR SEARCH THIS CLASS, SUBCLASS:

3.51,for selective monitoring and control including addressing with polling or roll call.
505,for interrogator-responder in a condition responsive indicating system with particular system function.
572.1through 572.9, for condition responsive detecting a detectable device on a protected article.
825.26,and 825.27, for such subject matter for interrogation and display of stock prices.
825.28,and 825.29, for such subject matter for interrogation and display of space allocation information.
825.31through 825.33, for transponders used for access control.
825.44through 825.48, for two-way paging in selective communications.
870.28,and 870.29, for continuously variable indicating via radiant energy, and subclass 870.32 via mutual inductance.

SEE OR SEARCH CLASS:

235, Registers,   subclasses 375 through 386for systems controlled by data bearing records which may include interrogation response system or device.
342, Communications: Directive Radio Wave Systems and Devices (e.g., Radar, Radio Navigation),   subclasses 42 through 51for transponder system using radar.
455, Telecommunications,   subclass 41.1 for near field communication and subclass 106 for modulation by absorption, shielding, or reflecting.
  
[List of Patents for class 340 subclass 10.2]    10.2Contention avoidance:
 This subclass is indented under 10.1.  including means to enable an interrogation controller to receive responses from multiple information containing devices relatively error free.

SEE OR SEARCH CLASS:

370, Multiplex Communications,   subclasses 229 through 240for data flow congestion prevention or control in a multiplex communications network.
  
[List of Patents for class 340 subclass 10.3]    10.3Interrogation signal detail:
 This subclass is indented under 10.1.  wherein an interrogation signal having designated characteristics is sent from the source controller.
  
[List of Patents for class 340 subclass 10.31]    10.31Individual call:
 This subclass is indented under 10.3.  wherein the interrogation signal uniquely identifies a specific information containing device.
  
[List of Patents for class 340 subclass 10.32]    10.32Group call:
 This subclass is indented under 10.3.  wherein the interrogation signal identifies a group of information containing devices.
  
[List of Patents for class 340 subclass 10.33]    10.33Wake up (all call):
 This subclass is indented under 10.3.  wherein the specific interrogation signal initiates a response from all information containing devices within range.
  
[List of Patents for class 340 subclass 10.34]    10.34Power up:
 This subclass is indented under 10.3.  wherein the interrogation signal provides energy to all information containing devices.
  
[List of Patents for class 340 subclass 10.4]    10.4Response signal detail:
 This subclass is indented under 10.1.  wherein a specific response signal is sent from the information containing device.
  
[List of Patents for class 340 subclass 10.41]    10.41Combination response:
 This subclass is indented under 10.4.  wherein the response signal is a composite signal including multiple type of information.
  
[List of Patents for class 340 subclass 10.42]    10.42Identification only:
 This subclass is indented under 10.4.  wherein the response signal includes the unique identity of the information containing device.
  
[List of Patents for class 340 subclass 10.5]    10.5Additional control:
 This subclass is indented under 10.1.  wherein a subsequent operation is performed in response to the interrogation signal.
  
[List of Patents for class 340 subclass 10.51]    10.51Programming (e.g., read/write):
 This subclass is indented under 10.5.  wherein the subsequent operation is the writing of data into the information containing device.
  
[List of Patents for class 340 subclass 10.52]    10.52ID code:
 This subclass is indented under 10.51.  wherein the data written is a unique identification of the information containing device.
  
[List of Patents for class 340 subclass 10.6]    10.6Printout or display:
 This subclass is indented under 10.1.  including an information presenting device for forming a permanent or semipermanent record of the information.
  
[List of Patents for class 340 subclass 14.1]    14.1Decoder matrix:
 This subclass is indented under subclass 825.  Subject matter having a two or more dimensional array of electrical elements in a receiver for distinguishing different control signals, and not elsewhere classifiable.
(1) Note. Switching systems including nonlinear saturable reactor (e.g., magnetic core) switching are classified elsewhere.
(2) Note. Information storage systems including nonlinear saturable reactors (e.g., magnetic cores) are classified elsewhere.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.2through 2.31, for a channel selecting matrix.

SEE OR SEARCH CLASS:

307, Electrical Transmission or Interconnection Systems,   subclasses 401 through 424for switching systems including nonlinear saturable reactor (e.g., magnetic core) switching.
326, Electronic Digital Logic Circuitry,   subclasses 105 through 108for a logic decoder which is a function of AND, OR, NAND, NOR, or NOT.
341, Coded Data Generation or Conversion,   appropriate subclasses for the production or converting of a code.
345, Computer Graphics Processing and Selective Visual Display Systems,   subclass 55 for a selectively actuated display matrix.
365, Static Information Storage and Retrieval,   subclasses 129 through 188for information storage systems including nonlinear saturable reactors (e.g., magnetic cores).
706, Data Processing: Artificial Intelligence,   subclasses 15 through 44for neural networks.
710, Electrical Computers and Digital Data Processing Systems: Input/Output,   subclasses 100 through 132for system intraconnecting, and particularly subclasses 131-132 for path selection and switching (e.g., crossbar switching) in a digital data processing system.
711, Electrical Computers and Digital Processing Systems: Memory,   subclasses 200 through 221for generalized address forming.
  
[List of Patents for class 340 subclass 14.2]    14.2Plural stage:
 This subclass is indented under subclass 14.1.  Subject matter wherein each element of the matrix is itself a matrix.

SEE OR SEARCH THIS CLASS, SUBCLASS:

2.21through 2.24, for plural stage channel selecting matrix, and subclass 2.6 for plural stage path selection in general.
  
[List of Patents for class 340 subclass 14.3]    14.3Programmable:
 This subclass is indented under subclass 14.1.  Subject matter wherein the array or an element thereof has a settable signal response in accordance with a programmed or other setting by an operator.

SEE OR SEARCH CLASS:

257, Active Solid-State Devices (e.g., Transistors,   Solid-State Diodes) subclass 209 for programmable path active solid-state gate array, and subclasses 529-530 for integrated circuit structure with programmable passive component.
326, Electronic Digital Logic Circuitry,   subclasses 37 through 50for programmable logic circuitry.
341, Coded Data Generation or Conversion,   subclass 78 for a programmable digital to digital converter.
365, Static Information Storage and Retrieval,   appropriate subclass for electromagnetic storage systems, and subclasses 185.01 through 185.33for floating gate memory storage (e.g., flash memory).
716, Data Processing: Design and Analysis of Circuit or Semiconductor Mask,   subclass 17 for programmable IC circuit design.
  
[List of Patents for class 340 subclass 14.31]    14.31Having fusible element:
 This subclass is indented under subclass 14.3.  Subject matter wherein a matrix element or link thereto has current fusible conductor which modifies the characteristics of the array when fused.
  
[List of Patents for class 340 subclass 14.4]    14.4Logic crosspoint:
 This subclass is indented under subclass 14.1.  Subject matter wherein the matrix processes a control signal to form a nonarithmetic digital output.

SEE OR SEARCH CLASS:

326, Electronic Digital Logic Circuitry,   appropriate subclasses for digital logic, per se.
  
[List of Patents for class 340 subclass 14.5]    14.5Bistable crosspoint:
 This subclass is indented under subclass 14.1.  Subject matter wherein an element has, or is part of, a circuit having two latched operating states, one of which is set by a control signal.

SEE OR SEARCH CLASS:

327, Miscellaneous Active Electrical Nonlinear Devices, Circuits, and Systems,   subclasses 185 through 230for a particular stable state (e.g., bistable) circuit, per se.
  
[List of Patents for class 340 subclass 14.6]    14.6