| 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) |
|---|
| 05/02/1989 | US4826316 Radiation detection apparatus |
| 05/02/1989 | CA1253589A1 Magnetic core and methods of consolidating same |
| 04/18/1989 | US4823343 Diagnostic system for remote computers |
| 04/18/1989 | US4823015 Electrical interference free projected beam smoke detector |
| 04/11/1989 | US4821022 Float assembly checking system |
| 04/06/1989 | DE3742397C1 Network analyser for indicating, analysing, recording, storing and indicating electromagnetic faults |
| 04/04/1989 | CA1252172A1 Smoke detection apparatus |
| 03/28/1989 | US4816806 Diagnosis switch |
| 03/23/1989 | WO1989002635A1 Proximity sensor |
| 03/15/1989 | EP0306692A1 Working method and room monitoring arrangement |
| 03/01/1989 | EP0304733A1 Data-transmission method |
| 02/28/1989 | US4808972 Security system with false alarm inhibiting |
| 02/28/1989 | CA1250634A1 Simulated targets for detection systems |
| 02/14/1989 | US4804942 Operating an end of line resistor loop |
| 02/07/1989 | US4803465 Apparatus for improving the reliability of an alarm circuit |
| 01/11/1989 | EP0298132A1 Facility for prevention of disasters |
| 01/05/1989 | DE3817548A1 Safety sensor |
| 01/03/1989 | US4796205 Fire alarm system |
| 01/03/1989 | CA1248245A1 Self-testing combustion products detector |
| 12/28/1988 | CA1247714A Alarm system diagnostic apparatus |
| 12/27/1988 | US4794376 In a progress measurement system |
| 12/21/1988 | EP0295984A1 On-board equipment for data processing and transmission |
| 12/21/1988 | EP0295593A2 Individual identification |
| 12/20/1988 | US4792797 Smoke detector having variable level sensitivity |
| 12/20/1988 | CA1247207A1 Fiber optics system with self test capability |
| 12/20/1988 | CA1246849A1 Fire detection installation operation control compound and application to various detector types |
| 12/14/1988 | EP0295146A2 Supervised, interactive alarm reporting system |
| 12/14/1988 | EP0294532A1 Integrity securing monitor and method for a security installation |
| 12/08/1988 | DE3717369A1 Method and device for room surveillance |
| 11/22/1988 | CA1245324A1 Fire/fault sensing using optical detector/pressure transducer combination |
| 11/17/1988 | WO1988009024A1 Temperature compensated detector for sensing and/or measuring passing objects |
| 11/15/1988 | CA1244901A1 Infrared intrusion detector |
| 11/09/1988 | EP0290413A2 Detector for sensing and/or measuring passing objects |
| 11/09/1988 | EP0289621A1 Passive infrared burglar sensor equipped with visual field interruption monitor mechanism |
| 10/20/1988 | WO1988007824A1 Information security box |
| 10/18/1988 | CA1243383A1 Alarm device for code driven electromechanical control device |
| 10/11/1988 | US4777473 Alarm system incorporating dynamic range testing |
| 09/27/1988 | US4774510 Monitoring annunciator apparatus |
| 09/27/1988 | US4774389 Intrusion detector switch system with wire bristle switch controls |
| 09/21/1988 | EP0283376A1 Magnetically controlled detector of the movement of a mobile part with respect to a fixed part for the opening of an enclosure |
| 09/21/1988 | EP0283142A1 Pest monitoring system |
| 09/20/1988 | US4772945 Surveillance system |
| 09/20/1988 | CA1242257A1 Photoelectric smoke detector |
| 09/13/1988 | CA1242012A1 Monitoring system |
| 09/06/1988 | US4769775 Microprocessor-controlled fire sensor |
| 09/01/1988 | DE3705681A1 Circuit arrangement for monitoring external lamps for sabotage and operation |
| 08/16/1988 | US4764759 Digital communication circuit with malfunction self-monitoring |
| 08/16/1988 | US4764755 Intruder detection system with false-alarm-minimizing circuitry |
| 08/16/1988 | US4764754 Fail-safe alarm circuit |
| 08/10/1988 | EP0277685A2 Fire sensing and suppression method and system responsive to optical radiation and mechanical wave energy |
| 08/10/1988 | EP0277185A1 Ultra-violet flame detector with analog output |
| 08/03/1988 | EP0276892A2 Fire sensing and suppression method and system responsive to optical radiation and mechanical wave energy |
| 07/28/1988 | WO1988005581A1 Facility for prevention of disasters |
| 07/28/1988 | WO1988005580A1 Personal alarm system |
| 07/20/1988 | EP0274889A2 Security sensors |
| 07/12/1988 | US4757303 Alarm system |
| 07/05/1988 | US4755816 Battery saving method for a selective call radio paging receiver |
| 07/05/1988 | US4755674 Infrared detector |
| 06/30/1988 | DE3643226A1 Device for operating a plurality of electrical loads in a reliable manner in signalling terms |
| 06/28/1988 | US4754263 Burglar alarm system |
| 06/28/1988 | US4754261 Security system |
| 06/21/1988 | US4752768 Intruder detector with anti-obscuring means |
| 06/08/1988 | EP0269747A1 Transmission circuit of facilities for preventing disasters |
| 06/08/1988 | EP0120917B1 Combustible vapor detection system |
| 06/07/1988 | US4749986 Collecting process of fire data and fire detector using the process and fire alarm system also using the process |
| 06/07/1988 | US4749871 Self-diagnostic projected-beam smoke detector |
| 06/07/1988 | US4749853 Light barrier having multiplexer for actuating transceiver pairs and multiple channel operation |
| 06/01/1988 | DE3639851A1 Method and circuit arrangement for monitoring a digital transmission system |
| 06/01/1988 | CN87213528U Photo-controlled warning device for automobile signal lights |
| 05/25/1988 | CN87205895U Auto time record megaphone controller for fire alarm |
| 05/24/1988 | US4746910 Passive infrared intrusion detector employing correlation analysis |
| 05/18/1988 | EP0267302A1 Circuit device for a detector arrangement for space surveillance |
| 05/18/1988 | EP0121521B1 Self-controlled and self protected alarm device |
| 05/10/1988 | US4743886 Testing apparatus for intrusion detectors |
| 05/10/1988 | US4743884 Point to point telealarm |
| 05/05/1988 | WO1988003301A1 Passive infrared burglar sensor equipped with visual field interruption monitor mechanism |
| 05/05/1988 | WO1988003287A1 Computer security system |
| 04/28/1988 | DE3636104A1 Electronic relay |
| 04/21/1988 | DE3634930A1 Method for monitoring rooms exposed to fire or explosion hazards |
| 04/20/1988 | EP0147385B1 A locality supervision system |
| 04/12/1988 | US4737784 Keyless entry system for automotive vehicle devices with weak-battery alarm |
| 04/12/1988 | US4737776 Circuit for detecting cut telephone service line and transmitting signal over telephone trunk line |
| 04/12/1988 | US4737771 Security system with interference detection |
| 04/06/1988 | EP0262268A1 Alarm circuit testing |
| 03/29/1988 | US4734680 Detection system with randomized transmissions |
| 03/15/1988 | CA1234212A1 Method and circuitry for the function control of ultrasonic alarm systems |
| 03/15/1988 | CA1234211A1 Method and circuitry for the function control of ultrasonic alarm systems |
| 03/15/1988 | CA1234199A1 Photoelectric smoke sensor |
| 03/10/1988 | DE3630373A1 Light-emitting diode with integrated function-monitoring element |
| 03/10/1988 | DE3630372A1 Light-emitting diode with integrated function-monitoring element |
| 03/09/1988 | EP0259015A2 Fault-detecting intrusion detection device |
| 03/01/1988 | US4729120 Method of, and circuit arrangement for, function control of ultrasonic alarm installations |
| 03/01/1988 | US4728935 Integrity securing monitor and method for a security installation |
| 03/01/1988 | US4728794 Radiation sensing arrangements |
| 02/25/1988 | WO1988001416A1 Ultra-violet flame detector with analog output |
| 02/23/1988 | US4727522 Method of, and circuit arrangement for, function control of ultrasonic alarm installations |
| 02/18/1988 | DE3627802A1 Monitoring circuit for lines in alarm systems |
| 02/16/1988 | US4725821 Device for generating an alarm signal |
| 02/16/1988 | US4725818 Walk through test system |
| 02/16/1988 | CA1232943A1 Remote indication low battery voltage enunciator method and apparatus |