| Patents for G08B 29 - Checking or monitoring of signalling or alarm systems; Prevention or correction of operating errors, e.g. preventing unauthorised operation (6,872) |
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| 02/02/1988 | US4724478 Cable television communication system with passive sensor signal path and a subscriber power supply source |
| 01/26/1988 | US4721945 Simulated targets for detection systems |
| 01/21/1988 | DE3624099A1 Device for audibly warning persons via a radio-frequency information channel |
| 01/21/1988 | DE3348107C2 Smoke suction system of a line smoke alarm |
| 01/20/1988 | EP0253709A1 Monitoring installation with detectors in the form of a loop |
| 01/19/1988 | US4720701 System with enhanced signal detection and discrimination with saturable magnetic marker |
| 01/19/1988 | US4719973 Fire and explosion detection and suppression |
| 01/14/1988 | WO1988000412A1 Improved monitoring methodology |
| 01/13/1988 | EP0252230A2 Method for controlling a motion detector |
| 01/07/1988 | EP0251224A2 Adapter module for improving the reliability of an alarm circuit |
| 01/07/1988 | EP0251223A2 Fail-safe alarm system |
| 01/07/1988 | EP0251097A1 Monitoring device for signal lights of a road traffic signal arrangement |
| 12/29/1987 | US4716401 Tamper-resistant supervisory system |
| 12/29/1987 | US4715985 Composition for checking the functioning of fire detection installations and application to various types of detectors |
| 12/16/1987 | EP0248957A1 Self-testing combustion products detector |
| 12/15/1987 | US4713506 Electrical contact making arrangement for monitoring the condition of a screw in an installed position |
| 12/09/1987 | EP0248298A1 Danger alarm installation |
| 12/02/1987 | EP0247862A2 Disaster prevention monitoring and control facility |
| 12/01/1987 | US4710750 Fault detecting intrusion detection device |
| 12/01/1987 | US4710629 Infrared intrusion detector |
| 12/01/1987 | CA1229895A1 Fire alarm system |
| 11/25/1987 | EP0247003A1 Security device against the theft of objects |
| 11/24/1987 | US4709330 System for supervising and guiding persons in construction |
| 11/24/1987 | US4709153 Intruder detector |
| 11/19/1987 | EP0246085A2 Surveillance systems |
| 11/17/1987 | US4707678 Consolidated magnetic core containing amorphous metal |
| 10/28/1987 | EP0242901A1 An electromagnetic detection system with improved false-alarm suppression |
| 10/27/1987 | US4703312 Voice-override alarm system |
| 10/15/1987 | DE3611603A1 Method and a device for processing sensor signals with simultaneous testing of the sensor system |
| 10/14/1987 | EP0240657A1 Method for monitoring a motion |
| 09/30/1987 | EP0238743A1 Burner control systems |
| 09/22/1987 | US4695734 Photoelectric smoke sensor including a photosensing data correction ratio correction circuit |
| 09/15/1987 | US4694282 Security monitoring system |
| 09/08/1987 | CA1226637A1 Test device for an optical infra red detector |
| 09/02/1987 | EP0234961A1 Device for quick detection of fire |
| 08/27/1987 | DE3620030A1 Arrangement for monitoring an essentially closed room |
| 08/25/1987 | CA1226052A1 Data reporting system |
| 08/18/1987 | US4687924 Modular transceiver with adjustable specular member |
| 08/05/1987 | EP0230517A2 Light barrier |
| 08/04/1987 | US4684929 Microwave/seismic security system |
| 07/29/1987 | CN87100371A Light barrier |
| 07/28/1987 | US4683459 Alarm system test annunciator |
| 07/21/1987 | US4682153 Fail-safe sensor system |
| 07/09/1987 | DE3600259A1 Motion detector for space surveillance |
| 07/07/1987 | US4679156 Microprocessor-controlled fire sensor |
| 06/30/1987 | US4677294 Self-calibrating radiation sensors and control for radiation sensors |
| 06/09/1987 | US4672217 Easily cleaned photoelectric smoke detector |
| 06/02/1987 | CA1222554A1 Method and apparatus for reporting dangerous conditions |
| 05/26/1987 | US4668935 Visual alarm reliability assurance system |
| 05/20/1987 | EP0222014A1 Fire sensor cross-correlator circuit and method. |
| 05/12/1987 | US4665390 Fire sensor statistical discriminator |
| 05/12/1987 | US4665384 Signal-transmitting junction unit of hazard alarm system |
| 05/12/1987 | US4665311 Smoke detecting apparatus |
| 05/12/1987 | US4664055 Alarm horn |
| 05/06/1987 | EP0220877A1 Fail-safe sensor system |
| 04/29/1987 | EP0219711A1 Infrared detector |
| 04/21/1987 | US4660024 Dual technology intruder detection system |
| 04/21/1987 | US4660023 Locality supervision system |
| 04/16/1987 | DE3536701A1 Device for monitoring the function of a sirene |
| 04/08/1987 | EP0217592A1 Tamper-resistant supervisory system |
| 04/08/1987 | EP0130992B1 Photoelectric smoke detector |
| 03/31/1987 | US4654745 Electronic access control system for use with conventional switch plates and boxes |
| 03/25/1987 | EP0097189B1 Light extinction smoke detector |
| 03/18/1987 | CN86106221A Tamper resistant supervisory |
| 03/17/1987 | US4651013 Smoke detector with changeable pulse light emitting interval for monitoring purposes |
| 03/12/1987 | WO1987007418A1 Transmission circuit of facilities for preventing disasters |
| 03/11/1987 | EP0213383A1 Method and device for monitoring the operation of optical smoke detectors |
| 03/10/1987 | US4648929 Magnetic core and methods of consolidating same |
| 03/03/1987 | US4647920 Fault detector |
| 03/03/1987 | US4647913 Self-diagnostic ultrasonic intrusion detection system |
| 03/03/1987 | US4647786 Photoelectric smoke detector and its application |
| 03/03/1987 | US4647785 Function test means of photoelectric type smoke detector |
| 02/26/1987 | WO1987001230A1 Fire sensor statistical discriminator |
| 02/26/1987 | WO1986006859A3 Fire sensor cross-correlator circuit and method |
| 02/24/1987 | US4646065 Fault-tolerant control system |
| 02/17/1987 | US4644331 Fire alarm system |
| 02/05/1987 | DE3527873A1 Area protection against sabotage at an intrusion signalling centre |
| 02/03/1987 | US4640628 Composite fire sensor |
| 02/03/1987 | CA1217541A1 Method of and apparatus for signalling an alarm |
| 01/29/1987 | DE3526341A1 Method and device for accurately evaluating the measurement signals determined from a capacitive protective fence |
| 01/27/1987 | US4639598 Fire sensor cross-correlator circuit and method |
| 01/06/1987 | CA1216340A1 Intrusion detector |
| 12/30/1986 | EP0205930A1 Burglary detection system |
| 12/23/1986 | US4631693 System for monitoring the operation of output transducers of a central control and monitoring unit for machines and/or devices usable in production and/or product packaging lines |
| 12/23/1986 | US4630684 Fire sensing and suppression method and system responsive to optical radiation and mechanical wave energy |
| 12/02/1986 | CA1214828A1 Paging receivers |
| 11/25/1986 | US4625201 Emergency battery cell monitor |
| 11/25/1986 | US4625198 Alarm system diagnostic apparatus |
| 11/20/1986 | WO1986006859A2 Fire sensor cross-correlator circuit and method |
| 11/18/1986 | US4623876 Alarm system to transmit detection information detected by a detector due to a radio system |
| 11/18/1986 | US4623788 Fiber optic system with self test used in fire detection |
| 11/11/1986 | US4622544 For use in an emergency response system |
| 11/11/1986 | US4622541 Intrusion detection system |
| 11/11/1986 | US4622539 Alarm system with alarm message supervision |
| 10/29/1986 | EP0199651A1 Alarm system for an electromechanical driving unit operated by a code |
| 10/28/1986 | CA1213311A1 Self testing system for reproduction machine |
| 10/21/1986 | US4618857 Low D.C. and loss of A.C. sensor and alarm with service inhibitor |
| 10/14/1986 | US4616928 Photoelectric smoke detector with adjustable background signal |
| 10/01/1986 | EP0195847A1 Remote low battery voltage indicating method and apparatus |
| 09/24/1986 | EP0195102A1 Electric contactor for monitoring a bolt screwed in a thread or a yielding material |