| Patents for G08B 17 - Fire alarms; Alarms responsive to explosion (10,975) |
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| 07/03/1991 | EP0434790A1 Particle detectors |
| 06/27/1991 | WO1991009391A1 Control system for fire alarm installations with peripheral fire protection devices and a central fire alarm system |
| 06/27/1991 | DE4041072A1 A smoke alarm of radiation source and twin chamber design - has a shield around the intermediate electrode, built in various forms, to protect the ionisation chamber from air currents |
| 06/25/1991 | US5026992 Spectral ratioing technique for NDIR gas analysis using a differential temperature source |
| 06/21/1991 | WO1991009390A1 Fire fighting system mainly conceived to safeguard forests |
| 06/21/1991 | WO1991009389A1 Infrared sensor suitable for fire fighting applications |
| 06/20/1991 | DE3941109A1 Steuerungssystem Control system |
| 06/19/1991 | EP0432680A1 Monitoring system employing infrared image |
| 06/18/1991 | US5025169 Sensor in IC formation |
| 06/11/1991 | US5023601 Smoke detector for TV |
| 06/11/1991 | US5023456 Radiation detector system |
| 06/04/1991 | US5022014 Ultrasonic temperature sensors, and ultrasonic waveguide connectors for use therewith |
| 06/04/1991 | US5021677 Light-scattering-type smoke detector |
| 05/29/1991 | CN2078000U Coal smoke detecting device |
| 05/28/1991 | US5019805 Smoke detector with strobed visual alarm and remote alarm coupling |
| 05/22/1991 | EP0148949B1 Fire sensor apparatus |
| 05/11/1991 | CA2029317A1 Flame detection |
| 05/02/1991 | WO1991006080A1 A stopping smoke alarm watch |
| 05/02/1991 | EP0424881A2 Utilization of an air transfer system for fire control and air transfer system adapted for the purpose |
| 05/01/1991 | CN2076257U Over-temp alarm device |
| 04/30/1991 | US5012223 Sound activated device and method |
| 04/30/1991 | US5011281 Humidification and cloud chamber block for particle concentration detection |
| 04/24/1991 | EP0423489A1 Smoke detection arrangement with monitoring |
| 04/17/1991 | CN2075366U Miner's lamp type gas alarm |
| 04/17/1991 | CN1012398B Fire alarm receiver |
| 04/16/1991 | US5008559 Method for operating an optical smoke detector and optical smoke detector for the method |
| 04/10/1991 | EP0421100A1 Procedure and equipment for recognizing dangerous conditions in a room |
| 04/10/1991 | EP0421032A1 Scanning system |
| 04/10/1991 | CN1050610A Rapid preparation method for standard air and its apparatus |
| 04/09/1991 | US5006710 Recognition and processing of waveforms |
| 04/03/1991 | EP0419668A1 Fire alarm system |
| 04/03/1991 | CN1012299B Multifunctional household gas alarm |
| 04/02/1991 | US5005003 Method of detecting fire in an early stage |
| 04/02/1991 | US5004922 Optical fiber scanning system for heat sensing |
| 03/27/1991 | EP0419046A1 Fire sensing system, process for sensing fire and environment monitor |
| 03/27/1991 | EP0418410A1 Method and device for compensating the air humidity in an optical smoke alarm |
| 03/27/1991 | EP0418409A1 Method and device to avoid prevailing weather effects on automatic fire alarms |
| 03/27/1991 | CN2073760U Automatic fire-extinguishing alarm |
| 03/27/1991 | CN1012228B Fire alarm sensing member |
| 03/20/1991 | EP0417388A2 Body vibrator |
| 03/19/1991 | US5001463 Method and apparatus for detecting airborne allergen particulates |
| 03/06/1991 | CN2072706U Photoelectric sounder for smoke and fire |
| 02/28/1991 | DE4026676A1 Automatic forest fire detection system - uses pyroelectric detector receiving light from optical scanner for monitored area |
| 02/26/1991 | US4996518 Fire alarm system |
| 02/26/1991 | US4995606 Board game |
| 02/26/1991 | CA2023263A1 Automatic forest fire sensing system |
| 02/21/1991 | DE4023649A1 Procedure and equipment for detection of dangerous gases - uses radiation source and detectors to provide raw data which is compared with reference values |
| 02/07/1991 | DE3924252A1 Fire detection equipment for sensing source of heat - uses array of temperature sensors with microprocessor control to detect fires and store information |
| 01/30/1991 | CN2070479U Multi-point two-line coding alarm instrument |
| 01/29/1991 | US4988977 Address setting means for fire detectors |
| 01/29/1991 | US4988884 High temperature resistant flame detector |
| 01/29/1991 | CA1279715C Gas shutoff apparatus |
| 01/23/1991 | EP0409266A2 Fire detector |
| 01/23/1991 | EP0409237A2 Fire extinguishing device utilizing a fire-extinguishing gas |
| 01/23/1991 | EP0408815A1 Millimeter radiometer, in particular for the detection of the seat of a fire |
| 01/23/1991 | EP0155969B1 Heat-resistant casing for ionization type smoke sensor |
| 01/16/1991 | EP0407429A1 Fluid pollution monitor |
| 01/16/1991 | CN2069585U Double bus addressable analog quantity detector |
| 01/16/1991 | CN2069283U Safety hydrant |
| 01/16/1991 | CN1048616A Thermal control ignition washer for outfiring alarm |
| 01/09/1991 | CN2069141U Domestic fuel gas leakage alarm |
| 01/08/1991 | US4983853 Method and apparatus for detecting flame |
| 01/02/1991 | EP0405473A2 Low profile detector with multi-sided source |
| 01/02/1991 | EP0405247A1 Line interruption supervisory device for fire alarm systems |
| 01/01/1991 | US4982092 360 Degree optical surveillance system |
| 12/27/1990 | WO1990016053A1 Particle detectors |
| 12/27/1990 | EP0403659A1 Fire alarm system |
| 12/25/1990 | US4980672 Overhead socket smoke detector with theft alarm |
| 12/19/1990 | EP0403245A2 Smoke alarm systems |
| 12/19/1990 | EP0402439A1 Ionization-type combustion gas detector |
| 12/12/1990 | EP0401273A1 Apparatus for supervising objects with regard to overheating. |
| 12/12/1990 | CA2018034A1 Battery sensing mechanism |
| 12/11/1990 | US4977527 Threshold compensation and calibration in distributed environmental detection system for fire detection and suppression |
| 12/11/1990 | US4977323 360 degree infrared surveillance with panoramic display |
| 12/06/1990 | DE3918239A1 Safety system for domestic appliances - uses fire and smoke sensors which can interrupt the mains supply |
| 12/05/1990 | EP0400607A2 Infrared monitoring system |
| 12/04/1990 | US4975688 Particulate detector disabling and protecting system |
| 12/04/1990 | US4975684 Fire detecting system |
| 12/04/1990 | US4975683 Cosmic radiation fault detection system |
| 11/28/1990 | EP0399244A2 A light-scattering-type smoke detector |
| 11/27/1990 | CA1277005C Smoke detection apparatus |
| 11/20/1990 | US4972178 Fire monitoring system |
| 11/20/1990 | US4972081 Instrumentation for detecting the presence of alpha radiation |
| 11/14/1990 | EP0396966A1 Portable radiometric data acquisition system |
| 11/14/1990 | EP0396767A1 Fire alarm apparatus |
| 11/14/1990 | EP0396609A1 Direction sensitive energy detecting apparatus |
| 11/08/1990 | CA2014654A1 Portable radiometric data acquisition system |
| 11/06/1990 | US4968975 Self-penetrating remote sensing smoke detector |
| 10/31/1990 | CN2064914U Gas automatic control alarm safety device |
| 10/31/1990 | CN2064913U Fire alarm with optical fibre of fusible metal |
| 10/31/1990 | CN1046628A Optic fibre fire alarm |
| 10/30/1990 | US4967187 Method and apparatus for particle concentration detection using a cloud chamber |
| 10/30/1990 | CA1275744C Smoke detector with ionization chamber |
| 10/23/1990 | US4965556 Combustion products detector having self-actuated periodic testing signal |
| 10/17/1990 | CN2064076U Multifunction electronic guartz clock |
| 10/10/1990 | CN2063671U Combustible gas detecting and alarm device |
| 10/09/1990 | US4962373 Scheme for power conservation in fire alarm system |
| 09/26/1990 | CN2062880U Hydrogen-sensitive gas alarm |
| 09/18/1990 | US4958144 Water-flow detector |
| 09/12/1990 | CN2062087U Predeterment-pressure low-temp. gas detecting alarm |