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Class Information
Number: 340/512
Name: Communications: electrical > Condition responsive indicating system > With particular system function (e.g., temperature compensation, calibration) > Alarm system supervision > Pulse
Description: Subject matter having electrical pulses, either from an energizing pulse source, or from some circuit means forming pulses related to an electrical alarm signal, in either the primary or supervisory circuit.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7498934 |
Power supply and useful data exchange between a fire alarm control unit and a current sink |
Mar. 3, 2009 |
| 7429929 |
Safety device |
Sep. 30, 2008 |
| 7418036 |
Method and circuit for timing pulse generation |
Aug. 26, 2008 |
| 7085130 |
Electronic device and button structure |
Aug. 1, 2006 |
| 6919802 |
Multi-layer method of accommodating code collisions from multiple surface acoustic wave identification tags |
Jul. 19, 2005 |
| 6791276 |
Gradually lighting/dimming wireless transmission indicator lamp |
Sep. 14, 2004 |
| 6704787 |
Date of birth authentication system and method using demographic and/or geographic data supplied by a subscriber that is verified by a third party |
Mar. 9, 2004 |
| 6614347 |
Apparatus and method for providing alarm synchronization among multiple alarm devices |
Sep. 2, 2003 |
| 6577232 |
Monopolar, synchronized communication system |
Jun. 10, 2003 |
| 6498563 |
Synchronized communication system |
Dec. 24, 2002 |
| 6384723 |
Digital communication system and method |
May. 7, 2002 |
| 6259363 |
Detector removal signalling device |
Jul. 10, 2001 |
| 6194994 |
Apparatus and method for synchronizing visual/audible alarm units in an alarm system |
Feb. 27, 2001 |
| 6191689 |
Detection device |
Feb. 20, 2001 |
| 6163263 |
Circuitry for electrical device in multi-device communications system |
Dec. 19, 2000 |
| 6121874 |
Multi-station dangerous condition alarm system incorporating alarm and chirp origination feature |
Sep. 19, 2000 |
| 5933078 |
Multi-station dangerous condition alarm system incorporating alarm and chirp origination feature |
Aug. 3, 1999 |
| 5850178 |
Alarm system having synchronizing pulse generator and synchronizing pulse missing detector |
Dec. 15, 1998 |
| 5844481 |
Intrusion detector for security systems |
Dec. 1, 1998 |
| 5793293 |
Temperature sensing system for over-heat detection |
Aug. 11, 1998 |
| 5708414 |
Sensitivity fault indication technique implemented in smoke detector system with self-diagnostic capabilities |
Jan. 13, 1998 |
| 5689263 |
Antipilferage markers |
Nov. 18, 1997 |
| 5668531 |
Synchronized alarm holding system |
Sep. 16, 1997 |
| 5598139 |
Fire detecting system with synchronized strobe lights |
Jan. 28, 1997 |
| 5574385 |
Testable solid state switch and related method |
Nov. 12, 1996 |
| 5525962 |
Communication system and method |
Jun. 11, 1996 |
| 5402101 |
Method for determining the configuration of detectors of a danger alarm system and for determining the system configuration of suitable detectors |
Mar. 28, 1995 |
| 5153583 |
Transponder |
Oct. 6, 1992 |
| 5029290 |
Emergency alert system |
Jul. 2, 1991 |
| 5025470 |
Automatic meter reading system with malfunction protection |
Jun. 18, 1991 |
| 4973943 |
Signal control system using two synchronous ring counter circuits |
Nov. 27, 1990 |
| 4853685 |
Switch monitoring arrangement with remote adjustment capability having debounce circuitry for accurate state determination |
Aug. 1, 1989 |
| 4849734 |
Self-diagnostic circuit for alarm-systems |
Jul. 18, 1989 |
| 4833451 |
Individual source identification |
May. 23, 1989 |
| 4733224 |
Detector system with multiple sensors each sensing different danger conditions |
Mar. 22, 1988 |
| 4718622 |
Train fault monitoring system |
Jan. 12, 1988 |
| 4713652 |
Electrical apparatus |
Dec. 15, 1987 |
| 4646065 |
Fault-tolerant control system |
Feb. 24, 1987 |
| 4625198 |
Alarm system diagnostic apparatus |
Nov. 25, 1986 |
| 4622541 |
Intrusion detection system |
Nov. 11, 1986 |
| 4618853 |
Fire detector |
Oct. 21, 1986 |
| 4578669 |
Remote switch position indicator |
Mar. 25, 1986 |
| 4563672 |
Microprocessor automatic program fail reset circuit |
Jan. 7, 1986 |
| 4543566 |
Electronic monitoring system with malfunction indicator |
Sep. 24, 1985 |
| 4538137 |
Fire detector |
Aug. 27, 1985 |
| 4525699 |
Electronic monitoring system with malfunction indicator |
Jun. 25, 1985 |
| 4498074 |
Selectively testable fire detector |
Feb. 5, 1985 |
| 4481502 |
Central smoke alarm and annunciator |
Nov. 6, 1984 |
| 4468664 |
Non-home run zoning system |
Aug. 28, 1984 |
| 4465998 |
Burglar-proof barrier |
Aug. 14, 1984 |
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