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Class Information
Number: 340/661
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Electrical characteristic > Voltage > Comparison
Description: Subject matter where the voltage is monitored by comparison with another voltage or a reference.

Patents under this class:
1 2 3 4 5 6 7 8

Patent Number Title Of Patent Date Issued
8692680 Residual-current circuit breaker Apr. 8, 2014
8624749 Bathing system controller having abnormal operational condition identification capabilities Jan. 7, 2014
8614632 Method of and apparatus for controlling a source of light in accordance in a source of sound Dec. 24, 2013
8599030 Communication apparatus, connection control method for communication apparatus and method of determining state of communication plug relative to communication connector in communication appara Dec. 3, 2013
8593270 Tester for testing signal lines of a flight control system for a THS motor of an aircraft Nov. 26, 2013
8593295 Process for detecting an alarm in an operating machine by determining an electric interaction between the operator and the machine Nov. 26, 2013
8570182 Server with voltage test system Oct. 29, 2013
8570181 Method and apparatus for supervisory circuit for ground fault circuit interrupt device Oct. 29, 2013
8547242 Power supply detecting circuit indicating a predetermined voltage range Oct. 1, 2013
8519857 Systems and methods of controlling a fan in an electronic system Aug. 27, 2013
8502649 Systems and methods for conveying information using a control signal referenced to alternating current (AC) power Aug. 6, 2013
8502688 Standalone self-supplied numeric controlled relay Aug. 6, 2013
8502689 System and method for voltage-based plasma excursion detection Aug. 6, 2013
8471720 On-chip power supply monitoring using a network of modulators Jun. 25, 2013
8421639 Branch current monitor with an alarm Apr. 16, 2013
8395520 Device for monitoring voltage of motherboard Mar. 12, 2013
8390465 Residual-current circuit breaker Mar. 5, 2013
8373569 Power line carrier (PLC) communication of standby generator status Feb. 12, 2013
8339270 Electrical ground protection device, circuit tester and method of circuit condition detection Dec. 25, 2012
8325054 Home appliance and signal output method thereof Dec. 4, 2012
8310371 Power supply protection device Nov. 13, 2012
8284035 Systems and methods for conveying information using a control signal referenced to alternating current (AC) power Oct. 9, 2012
8258971 Low voltage warning circuit Sep. 4, 2012
8232887 Electronic monitoring of the on-board power supply system of a motor vehicle with respect to voltage peaks or voltage drops Jul. 31, 2012
8174399 Methods to detect hazardous conditions in a safety ground circuit in the presence of ground loop currents and electrical noise May. 8, 2012
8164470 Bathing system controller having abnormal operational condition identification capabilities Apr. 24, 2012
8098148 Sensor signal processor apparatus Jan. 17, 2012
8084963 Management of rechargeable battery in an enclosed lighting module Dec. 27, 2011
8085160 Load detector for a dimmer Dec. 27, 2011
8077049 Method and apparatus for communicating power distribution event and location Dec. 13, 2011
8068937 Power distribution system with fault protection using energy packet confirmation Nov. 29, 2011
8026809 Monitoring method and stationary unit for a motor-driven door Sep. 27, 2011
8022818 Warning apparatus for a motor vehicle Sep. 20, 2011
7982625 Bathing system controller having abnormal operational condition identification capabilities Jul. 19, 2011
7978089 Method and apparatus for ground fault detection Jul. 12, 2011
7961096 System and method for detection of EAS marker shielding Jun. 14, 2011
7956637 System and method to determine electric motor efficiency using an equivalent circuit Jun. 7, 2011
7944365 Systems, methods, and apparatuses for stray voltage detection May. 17, 2011
7864028 In-vehicle emergency call apparatus Jan. 4, 2011
7843357 Bathing system controller having abnormal operational condition identification capabilities Nov. 30, 2010
7834775 Automatic detecting device for radio frequency environment Nov. 16, 2010
7834744 Circuit monitoring device Nov. 16, 2010
7791494 Voltage monitoring device Sep. 7, 2010
7782217 System and method for monitoring motor Aug. 24, 2010
7746243 Pump failure alarm device Jun. 29, 2010
7725295 Cable fault detection May. 25, 2010
7705726 Wireless-enabled device with capability of responding to changes in operational state Apr. 27, 2010
7675427 System and method for determining distribution transformer efficiency Mar. 9, 2010
7619535 Power monitoring apparatus of fan Nov. 17, 2009
7602305 Feedback circuit for a display sign and method Oct. 13, 2009

1 2 3 4 5 6 7 8

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