| Patents for G08B 25 - Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems (15,949) |
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| 02/19/1980 | US4189720 Repeater for smoke and similar alarms |
| 01/09/1980 | EP0006495A2 Radio network comprising portable transceivers |
| 01/08/1980 | CA1069602A1 Fluid flow detector for a fire alarm system |
| 12/18/1979 | US4179751 Memory apparatus for disaster preventing system |
| 12/12/1979 | EP0006010A1 Anti-theft system for automotive vehicles |
| 11/27/1979 | US4176346 Smoke alarm network |
| 11/27/1979 | US4176343 Portable remote control signal |
| 11/27/1979 | US4175677 Self-contained actuation and detection device |
| 11/20/1979 | CA1066780A1 Radio central station alarm system |
| 11/15/1979 | WO1979000902A1 Alarm device partly mobile with protection against failure to operate,breakdown,sabotage and false alarm |
| 11/13/1979 | US4174517 Central system for controlling remote devices over power lines |
| 10/31/1979 | EP0005046A1 Electrical alarm circuits and systems |
| 10/31/1979 | EP0004912A1 Annunciator of danger |
| 10/31/1979 | EP0004911A1 Annunciator of danger |
| 10/31/1979 | EP0004910A1 Annunciator of danger |
| 10/31/1979 | EP0004909A1 Annunciator of danger |
| 10/23/1979 | US4172252 Monitoring arrangement for monitoring a change from a normal condition of any one of a plurality of condition sensing devices |
| 10/09/1979 | US4170769 Audio-detector alarm |
| 09/18/1979 | CA1062792A1 Central station system transmission apparatus |
| 08/28/1979 | US4166273 Intrusion detector system |
| 07/31/1979 | US4163224 Display device with memory |
| 07/31/1979 | US4163218 Electronic multiple device control system |
| 07/31/1979 | US4163215 Safety lock system for controlling access to an area in response to predetermined data inputs |
| 07/24/1979 | US4162489 Fire alarm system comprising a plurality of alarms which may be operated by way of an alarm loop |
| 07/24/1979 | US4162485 Fire protection apparatus |
| 07/24/1979 | US4162483 Bilateral master station-plural satellite station signalling apparatus |
| 07/24/1979 | US4162449 Apparatus for communicating receipt of transmitted messages |
| 07/17/1979 | US4161721 Alarm device having code verification system |
| 07/17/1979 | CA1058588A1 Moving light reflector warning device |
| 07/03/1979 | US4160246 Wireless multi-head smoke detector system |
| 07/03/1979 | CA1057833A1 Multi-subscriber alarm system with central receiving and transmitting installation |
| 06/05/1979 | US4157540 Wireless alarm system |
| 05/01/1979 | US4152693 Vehicle locator system |
| 04/10/1979 | US4149158 Security system for CATV terminal |
| 04/03/1979 | US4148021 Alarm system utilizing bidirectional wired television system |
| 04/03/1979 | US4148019 Security alarm transmission system |
| 03/27/1979 | US4146884 Monitoring system |
| 03/27/1979 | CA1051535A1 Pulsed alarm system |
| 03/27/1979 | CA1051521A1 Vehicle safety and crime deterrent communication system |
| 02/20/1979 | US4141009 Back up alarm system |
| 02/20/1979 | US4141008 Energy-responsive intruder detection system |
| 02/20/1979 | US4141006 Security system for centralized monitoring and selective reporting of remote alarm conditions |
| 02/13/1979 | US4139844 Surveillance method and system with electromagnetic carrier and plural range limiting signals |
| 02/06/1979 | US4138674 Four wire multi-satellite intrusion alarm control system with tamper switch |
| 01/30/1979 | US4137526 Alarm zone disabling control circuit |
| 01/16/1979 | US4135184 Electronic theft detection system for monitoring wide passageways |
| 01/09/1979 | US4134108 Emergency alarm device |
| 01/02/1979 | CA1045691A1 Method and apparatus for extending the operating range of a condition monitoring system |
| 12/26/1978 | US4131882 Digital two-wire irrigation control system with feedback |
| 10/17/1978 | US4121201 Carrier current appliance theft alarm |
| 10/17/1978 | US4121160 Switch means for radio alarm device |
| 10/10/1978 | US4119943 Monitor system for construction vehicles |
| 10/03/1978 | US4118700 Single wire transmission of multiple switch operations |
| 10/03/1978 | US4118694 Base loop code transmitter |
| 10/03/1978 | CA1039542A1 Timed buzzer |
| 09/26/1978 | US4117479 Multi-mode intrusion alarm system |
| 09/26/1978 | US4117405 Narrow-band radio communication system |
| 09/12/1978 | US4114150 Alarm system |
| 09/05/1978 | US4112463 System for detecting a motion in the monitoring area of two or more television cameras |
| 08/29/1978 | US4110741 Device for monitoring physical activity of persons |
| 08/29/1978 | US4110738 Anti-theft alarm with coded radio link |
| 08/22/1978 | US4109239 Radio frequency alarm system including transmitting, coding and decoding circuitry |
| 08/15/1978 | US4107611 Police protection method and apparatus |
| 08/08/1978 | US4106000 Anti-theft device with disabling means |
| 08/01/1978 | US4104618 Remote signaling system |
| 07/18/1978 | US4101875 Multi-satellite intrusion alarm control system |
| 07/18/1978 | US4101872 Fire detection system |
| 07/11/1978 | USRE29701 Timed buzzer |
| 07/04/1978 | US4099169 Alarm device for detaining user |
| 07/04/1978 | US4099157 Single wire power/signal system for vehicle auxiliary devices |
| 07/04/1978 | US4098274 Digital memory with power outage and memory overload logic in a dialysis system |
| 06/20/1978 | US4096473 High output smoke and heat detector alarm system utilizing a piezoelectric transducer and a voltage doubling means |
| 06/20/1978 | US4096354 Apparatus for distinguishing between failures in a digital transmission network |
| 06/13/1978 | US4095220 Alarm detection and identification system |
| 06/13/1978 | US4095211 Coded electronic security system |
| 05/23/1978 | US4091366 Sonic monitoring method and apparatus |
| 05/16/1978 | US4090193 Frequency multiplexed water leak detection system |
| 05/09/1978 | US4088988 Personnel cable transport safety system |
| 05/09/1978 | CA1031052A1 Alarm device for automotive vehicles |
| 05/02/1978 | US4087803 Fire box alarm |
| 03/28/1978 | US4081796 Fire alarm deterrent |
| 03/28/1978 | US4081795 Apparatus and method for detecting the occurrence of an alarm condition |
| 02/21/1978 | US4075628 Alarm system utilizing cable-tv multi-receiver systems |
| 02/14/1978 | US4074250 Alarm box with fingerprint recorder |
| 02/07/1978 | US4072945 Radar-operated collision avoidance system for roadway vehicles using stored information for determination of valid objects |
| 02/07/1978 | US4072931 Radio frequency alarm system including transmitting, coding and decoding circuitry |
| 02/07/1978 | US4072925 Warning system for vehicles |
| 01/10/1978 | US4068105 Central station system transmission apparatus |
| 01/03/1978 | US4066966 Alarm system utilizing a bidirectional transmission line in CATV system |
| 12/27/1977 | US4065758 Alarm detector responsive to rate of change of a monitored condition |
| 12/20/1977 | US4063410 Digital watch including a signal transmitter |
| 11/29/1977 | US4060803 Security alarm system with audio monitoring capability |
| 11/29/1977 | US4060800 Fire alarm device |
| 11/08/1977 | US4057794 Calling aids |
| 11/08/1977 | US4057790 Personal aid signalling system |
| 10/11/1977 | US4053868 Vehicle system monitor |
| 09/27/1977 | US4051467 Fluid flow detector for a fire alarm system |
| 09/13/1977 | US4048621 Coding system for an alarm system and the like |
| 08/09/1977 | US4041452 A rotating beacon for a bicycle |
| 08/02/1977 | US4040045 Method and apparatus for creating and detecting alarm condition using a master antenna television system |