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Class Information
Number: 340/635
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Condition of electrical apparatus
Description: Subject matter wherein the monitored condition is an electrical property of a specific electrical device or circuit.










Sub-classes under this class:

Class Number Class Name Patents
340/636.1 Battery 551
340/652 Breaking of circuit continuity 377
340/654 Circuit energization 165
340/649 Condition of intentional grounding circuit 148
340/653 Electronic circuit or component 256
340/638 Fuse or circuit breaker 258
340/640 Heater element 55
340/647 Insulation 66
340/648 Motor 214
340/645 Rectifier 55
340/641 Signalling light element 193
340/644 Switch or relay 313
340/646 Transformer 74
340/650 Undesired circuit ground or short 300
340/637 Watt-hour meter 49


Patents under this class:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Patent Number Title Of Patent Date Issued
6542082 Remote and non-visual detection of illumination device operation Apr. 1, 2003
6535138 HVAC network verification system Mar. 18, 2003
6525665 Electrical circuit tracing device Feb. 25, 2003
6525666 Power circuit Feb. 25, 2003
6525664 Control console remote monitoring system Feb. 25, 2003
6522256 Hybrid current and voltage sensing system Feb. 18, 2003
6512458 Method and apparatus for detecting failure in solar cell module, and solar cell module Jan. 28, 2003
6504486 Dual voltage sense cell for input/output dynamic termination logic Jan. 7, 2003
6504484 Control method using power to prevent overheat inside of electric equipment Jan. 7, 2003
6496119 Protection circuit for an integrated circuit Dec. 17, 2002
6491226 METHOD AND APPARATUS FOR PREVENTING EXTRACTION OF CARD-SHAPED FUNCTIONAL DEVICE FOR INFORMATION PROCESSING APPARATUS, AND RECORDING MEDIUM STORING PROGRAM FOR REALIZING EXTRACTION PREVENTING O Dec. 10, 2002
6472991 Multichannel communication protocol configured to extend the battery life of an implantable device Oct. 29, 2002
6469630 System and method for determining the environmental configuration of telecommunications equipment Oct. 22, 2002
6469629 Distributed logic in multiple protective relays Oct. 22, 2002
6466132 Incipient failure indication apparatus for an environment control system Oct. 15, 2002
6466126 Portable data device efficiently utilizing its available power and method thereof Oct. 15, 2002
6459381 Apparatus for detecting operation of an electric fence and fence charger Oct. 1, 2002
6459380 Semiconductor apparatus with alarm predicting means Oct. 1, 2002
6456085 Diagnostic device for detecting short circuits or line interruptions in an inductive sensor Sep. 24, 2002
6456198 Fence sensor Sep. 24, 2002
6452502 Method and apparatus for early detection of reliability degradation of electronic devices Sep. 17, 2002
6452501 Automatic shut-off and indication device for an electric heating appliance and electric pressing iron comprising such a device Sep. 17, 2002
6448899 Power indicating ethernet outlet and method therefor Sep. 10, 2002
6445305 CMOS low battery voltage detector Sep. 3, 2002
6437695 Method for capacitive object recognition in vehicles Aug. 20, 2002
6437700 Ground fault circuit interrupter Aug. 20, 2002
6433698 Fault indicator providing light indication on fault detection Aug. 13, 2002
6420969 Appliance alarm system Jul. 16, 2002
6417776 Input buffer circuit having function for detecting cable connection Jul. 9, 2002
6417775 Methods and systems for monitoring lighting control and indicating failure Jul. 9, 2002
6407672 Adaptive CPU cooling fan speed monitor device Jun. 18, 2002
6404346 Method and apparatus for detecting a failed thyristor Jun. 11, 2002
6400275 Auditory cues for notification of device activity Jun. 4, 2002
6392557 Programmable logic controller override output board May. 21, 2002
6392552 Weak cooling/overcooling compensation device for refrigerator May. 21, 2002
6380862 Electrical distribution panel employing a surge protector Apr. 30, 2002
6377184 Transmission line safety monitoring system Apr. 23, 2002
6366209 Method and apparatus for early detection of reliability degradation of electronic devices Apr. 2, 2002
6362744 Apparatus for checking an electrical drive Mar. 26, 2002
6348873 Apparatus and method for user-mediated control of CPU temperature in notebook computers Feb. 19, 2002
6339380 Electronic over stress detector circuit for magnetoresistive devices in data storage devices such as disc drives Jan. 15, 2002
6337630 Apparatus and method for detecting cooling conditions in a computer Jan. 8, 2002
6331821 Combination current sensor and relay Dec. 18, 2001
6326898 Solenoid plunger position detection algorithm Dec. 4, 2001
6320404 Defective power source detection method and apparatus of power source supply system Nov. 20, 2001
6321151 Automotive diagnostic interface device Nov. 20, 2001
6313751 Battery failure indicator for a single battery Nov. 6, 2001
6313750 Measuring cell voltages of a fuel cell stack Nov. 6, 2001
6310556 Apparatus and method for detecting a low-battery power condition and generating a user perceptible warning Oct. 30, 2001
6307480 Integrated circuit reset incorporating battery monitor and watchdog timer Oct. 23, 2001

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