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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:
| Patent Number |
Title Of Patent |
Date Issued |
| 6895022 |
Distributed architecture communication system having bus voltage compensation |
May. 17, 2005 |
| 6894602 |
System and method for active detection of connection to a network |
May. 17, 2005 |
| 6861955 |
Method and circuit for detecting the state of a switch |
Mar. 1, 2005 |
| 6844819 |
Voltage sensing hand tool |
Jan. 18, 2005 |
| 6828914 |
In-use unambiguously determining the near-end-of-life state of a combustion engine battery |
Dec. 7, 2004 |
| 6824362 |
Fan control system |
Nov. 30, 2004 |
| 6788214 |
Power outage alert electronic device |
Sep. 7, 2004 |
| 6788215 |
Electric field detector with GPS |
Sep. 7, 2004 |
| 6774803 |
Fault trip indicator and maintenance method for a circuit breaker |
Aug. 10, 2004 |
| 6731218 |
Voltage sensing hand tool |
May. 4, 2004 |
| 6693548 |
Structural monitoring system for helicopter rotor components |
Feb. 17, 2004 |
| 6675071 |
Power quality utility metering system having waveform capture |
Jan. 6, 2004 |
| 6670888 |
Method of detecting improper mounting of acceleration sensors on a vehicle |
Dec. 30, 2003 |
| 6667692 |
Electrical utility meter having harmonic data templates for power quality alarm thresholds |
Dec. 23, 2003 |
| 6658915 |
Portable sensor |
Dec. 9, 2003 |
| 6646561 |
Method and device for in-use detecting low cranking strength of a combustion engine battery during engine starting |
Nov. 11, 2003 |
| 6633171 |
Electronic component desired voltage level comparison |
Oct. 14, 2003 |
| 6614356 |
Digital meter for use of current and voltage |
Sep. 2, 2003 |
| 6600425 |
Method and apparatus for detecting and recording episodic overloads in a circuit |
Jul. 29, 2003 |
| 6549138 |
Method and apparatus for providing detection of excessive negative offset of a sensor |
Apr. 15, 2003 |
| 6541980 |
Multiplex voltage measurement apparatus |
Apr. 1, 2003 |
| 6522255 |
Handle sensor for detecting signals from human body to a signal processing circuit |
Feb. 18, 2003 |
| 6518880 |
Physical-quantity detection sensor |
Feb. 11, 2003 |
| 6459377 |
Abnormal condition detecting system detecting abnormal condition of user at residence |
Oct. 1, 2002 |
| 6459998 |
Sensing downed power lines |
Oct. 1, 2002 |
| 6456086 |
Voltage monitoring device for monitoring two different supply voltages received by an electronic component |
Sep. 24, 2002 |
| 6452502 |
Method and apparatus for early detection of reliability degradation of electronic devices |
Sep. 17, 2002 |
| 6429785 |
Revenue meter having precision time clock |
Aug. 6, 2002 |
| 6414600 |
Ground check system for delta-flex test handler |
Jul. 2, 2002 |
| 6384723 |
Digital communication system and method |
May. 7, 2002 |
| 6366209 |
Method and apparatus for early detection of reliability degradation of electronic devices |
Apr. 2, 2002 |
| 6360177 |
Voltage scanning, measurement, storage and reporting device |
Mar. 19, 2002 |
| 6353914 |
Preamp writer fault detection circuit |
Mar. 5, 2002 |
| 6337570 |
Current loop comprising a test circuit |
Jan. 8, 2002 |
| 6329924 |
Wearable electric field detector |
Dec. 11, 2001 |
| 6317056 |
Circuit for intrinsically safe detection of the binary signals of a transmitter |
Nov. 13, 2001 |
| 6314307 |
Portable electronic apparatus having a detection device for detecting a variation of the supply voltage |
Nov. 6, 2001 |
| 6307480 |
Integrated circuit reset incorporating battery monitor and watchdog timer |
Oct. 23, 2001 |
| 6275161 |
Method and apparatus for automotive battery condition indication |
Aug. 14, 2001 |
| 6259371 |
Power surge detection device |
Jul. 10, 2001 |
| 6255939 |
Method and device for sensing an object or a person in the interior of a vehicle |
Jul. 3, 2001 |
| 6246332 |
System and method for detecting voltage and current imbalance in an electrical energy supply |
Jun. 12, 2001 |
| 6243009 |
Method and circuit arrangement for comparing output signals with reference signals having different reference levels |
Jun. 5, 2001 |
| 6236326 |
Method and apparatus for intelligently signaling a battery charge condition in a wireless telephone |
May. 22, 2001 |
| 6225911 |
Information processing apparatus and its control method for cooling inside apparatus with fan |
May. 1, 2001 |
| 6208258 |
Circuit and method for determining whether AC mains voltage is below or above a predetermined set point |
Mar. 27, 2001 |
| 6208242 |
Circuit configuration to monitor a regulated output voltage in a motor vehicle |
Mar. 27, 2001 |
| 6169475 |
System and method for active detection of connection to a network |
Jan. 2, 2001 |
| 6163266 |
Fan operation detection circuit for a DC fan and method of operation thereof |
Dec. 19, 2000 |
| 6157308 |
Detecting hidden faults in reliable power systems |
Dec. 5, 2000 |
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