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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 |
| 6150945 |
Static charge warning device |
Nov. 21, 2000 |
| 6147616 |
Automatic power interruption and re-supply relay for an electric power line |
Nov. 14, 2000 |
| 6118384 |
Battery monitor with software trim |
Sep. 12, 2000 |
| 6107927 |
Generator set controller with integral synchroscope mode |
Aug. 22, 2000 |
| 6094144 |
Method and apparatus for early detection of reliability degradation of electronic devices |
Jul. 25, 2000 |
| 6091325 |
Device and method for warning of vehicle battery deterioration |
Jul. 18, 2000 |
| 6091324 |
Comparing sensor outputs to distinguish between sensor faults and extreme temperature conditions |
Jul. 18, 2000 |
| 6087948 |
Encoder |
Jul. 11, 2000 |
| 6081198 |
Method and apparatus for communication in an electric fence wiring system |
Jun. 27, 2000 |
| 6075448 |
Apparatus and method for testing an electrical circuit |
Jun. 13, 2000 |
| 6072399 |
Method of determining the quantity of the material cut by an electrically powered cutting tool and circuit arrangement for implementing this method |
Jun. 6, 2000 |
| 6064313 |
Alternating current circuit and outlet tester |
May. 16, 2000 |
| 6057610 |
Lighter plug DC outlet and single AC and DC plug with adapter circuit |
May. 2, 2000 |
| 6040779 |
Method and circuit for monitoring the functioning of a sensor bridge |
Mar. 21, 2000 |
| 6034612 |
Circuitry and process for testing non-intermittent signal generators |
Mar. 7, 2000 |
| 6034601 |
Method and apparatus for determining proper installation of alarm devices |
Mar. 7, 2000 |
| 6023228 |
Method and apparatus for checking electrical drive mechanisms |
Feb. 8, 2000 |
| 5995011 |
Voltage monitoring circuit and voltage monitoring method with hysteresis characteristic |
Nov. 30, 1999 |
| 5973604 |
Method for monitoring optical fiber cables for lightning damage |
Oct. 26, 1999 |
| 5959537 |
Variable trip fault indicator |
Sep. 28, 1999 |
| 5936537 |
High frequency signal detector |
Aug. 10, 1999 |
| 5929758 |
Method and apparatus for achieving parallel cable boring |
Jul. 27, 1999 |
| 5907283 |
Power supply voltage detecting circuit for use in semiconductor memory device |
May. 25, 1999 |
| 5905439 |
Apparatus and method for monitoring a plurality of parallel loads having a common supply |
May. 18, 1999 |
| 5892450 |
Circuit arrangement for testing the operation of a current monitoring circuit for a power transistor |
Apr. 6, 1999 |
| 5886640 |
Power monitoring circuit for the central processing unit on a computer circuit board |
Mar. 23, 1999 |
| 5886642 |
Tank barge interface |
Mar. 23, 1999 |
| 5883578 |
Loss of potential determination for use in protective relays for electric power systems |
Mar. 16, 1999 |
| 5883573 |
Message generation supervision system |
Mar. 16, 1999 |
| 5875245 |
High voltage detection circuit, bell signal detection circuit and non-ringing reception detection circuit |
Feb. 23, 1999 |
| 5844490 |
Monitoring device for a chemical reagent supply system |
Dec. 1, 1998 |
| 5831541 |
Method and circuit for determining if seed sensor is operably connected to seed monitor system |
Nov. 3, 1998 |
| 5828302 |
Door sensor with self-diagnosing function |
Oct. 27, 1998 |
| 5828316 |
Keyless entry function expander |
Oct. 27, 1998 |
| 5818338 |
Flood light lamp removal alarm |
Oct. 6, 1998 |
| 5805068 |
Cordless device with battery imbalance indicator |
Sep. 8, 1998 |
| 5805061 |
Electronic flasher unit for vehicle lighting system and method of monitoring the operation thereof |
Sep. 8, 1998 |
| 5801623 |
Method of detecting a lamp outage condition in a vehicle flasher system |
Sep. 1, 1998 |
| 5789098 |
Method of detecting external voltage source for disablement of battery conservation mode in a portable communications device |
Aug. 4, 1998 |
| 5786756 |
Method and system for the prevention of false alarms in a fire alarm system |
Jul. 28, 1998 |
| 5767780 |
Detector for flow abnormalities in gaseous diffusion plant compressors |
Jun. 16, 1998 |
| 5767781 |
Method for detection of failed heater in a daisy chain connection |
Jun. 16, 1998 |
| 5757275 |
Fault monitoring technique for programmable logic controllers |
May. 26, 1998 |
| 5751217 |
Method and apparatus for assessing available battery life in a rechargeable battery |
May. 12, 1998 |
| 5717384 |
Warning device for printers |
Feb. 10, 1998 |
| 5708420 |
Voltage detection circuit compensated in technology and temperature |
Jan. 13, 1998 |
| 5703790 |
Series connection of multiple digital devices to a single power source |
Dec. 30, 1997 |
| 5696437 |
Intelligent low battery detection circuit for a paging receiver |
Dec. 9, 1997 |
| 5684466 |
Electrical strike system control for subsurface boring equipment |
Nov. 4, 1997 |
| 5684465 |
Method and means for supervision of valve units |
Nov. 4, 1997 |
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