| Patents for G08B 17 - Fire alarms; Alarms responsive to explosion (10,975) |
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| 04/26/1977 | US4020415 Combustion product indicator |
| 04/19/1977 | US4018513 Optical window used in device for monitoring clarity of a fluid |
| 04/12/1977 | US4017852 Apparatus for supervising leads interconnecting a plurality of self-contained abnormal condition sensing and alarm annunciating units |
| 04/12/1977 | US4017733 Ionization type smoke sensor |
| 04/05/1977 | US4016524 Sensor for a gas detector, in particular for smoke detection |
| 04/05/1977 | US4016425 Methods and apparatus for optimizing the response of transducers |
| 04/05/1977 | US4016424 Ultraviolet radiation detector |
| 03/15/1977 | US4012729 Multi-element ionization chamber |
| 03/08/1977 | US4011458 Photoelectric detector with light source intensity regulation |
| 02/22/1977 | US4009055 Apparatus for producing electricity in case of fire |
| 02/08/1977 | US4007456 Gas detecting and warning system |
| 02/08/1977 | US4007374 Ionization detector with improved radiation source |
| 01/18/1977 | US4004288 Battery operated fire detection unit |
| 01/11/1977 | US4003039 Optical fire detection system |
| 01/04/1977 | US4001800 Smoke detecting device |
| 12/21/1976 | US3999079 Fire detector |
| 12/07/1976 | US3996578 Alarm system |
| 11/30/1976 | US3994603 Detection system to determine the transmissivity of a medium with respect to radiation, particularly the light transmissivity of smoke-contaminated air, for fire detection |
| 11/16/1976 | US3992110 Multi-spectral optical comparator |
| 11/16/1976 | US3992102 Photoelectric smoke detector with means for adjusting the amount of light projected into the detection region |
| 11/09/1976 | US3990518 Automatic fire alarm and extinguisher device |
| 11/02/1976 | US3989463 Sensing element and detection system employing such element for detection of environmental borne material |
| 10/26/1976 | US3988725 Detector system |
| 10/19/1976 | US3987423 Ionization-chamber smoke detector system |
| 10/12/1976 | US3985453 Light scattering type smoke detector |
| 10/05/1976 | US3984826 Condition detector, especially for detecting atmospheric conditions |
| 09/28/1976 | US3983548 Fire detection system |
| 09/21/1976 | US3982237 Combination door chime and particulate products of combustion detector |
| 09/21/1976 | US3982130 Ultraviolet wavelength smoke detector |
| 09/14/1976 | US3980997 Smoke detector |
| 09/14/1976 | US3980928 Fire detectors |
| 09/07/1976 | US3979648 System for operating fire prevention devices |
| 08/31/1976 | US3978397 Apparatus for sensing particles |
| 08/03/1976 | US3973257 Apparatus for detecting changes in the electrical characteristics of sensor devices |
| 08/03/1976 | US3973192 Device for providing an early detection of aerosol products of combustion of a polyvinyl chloride substance |
| 07/27/1976 | US3971333 Activation indicator for a fire detector |
| 07/20/1976 | USRE28915 Detection of products of combustion |
| 07/13/1976 | US3969720 Emergency alarm and evacuation system |
| 07/13/1976 | US3969710 Apparatus for picking up signal currents flowing through signal lines |
| 07/06/1976 | US3968379 Photocell smoke detector |
| 06/29/1976 | US3967255 Flame detection system |
| 06/15/1976 | US3964044 Multiple operating alarm systems employing oil burner flame monitoring relays |
| 06/15/1976 | US3964036 Ionization smoke detector co-used to issue fire alarm and detect ambient atmosphere |
| 06/15/1976 | US3963948 Magnetic pulse generator |
| 06/15/1976 | US3963929 Ionization analyzing air pollution, smoke and fire alarm device |
| 06/08/1976 | US3962693 Motion detection device including a pendulum switch |
| 06/01/1976 | US3961328 Detection system |
| 06/01/1976 | US3961195 Fire detector having means for heating the support member of an electrode to prevent formation of moisture thereon |
| 05/25/1976 | US3959788 Ionization-type fire detector |
| 05/04/1976 | US3955186 Character image generation apparatus and CRT phototypesetting system |
| 05/04/1976 | US3954342 Optical device for monitoring clarity of a fluid |
| 04/27/1976 | US3953844 Incipient fire detector |
| 04/27/1976 | US3953669 Video tracking system |
| 04/27/1976 | US3952808 Fire protection systems |
| 04/20/1976 | US3952294 Smoke detection alarm system |
| 04/20/1976 | US3952196 Radiation detection apparatus |
| 04/13/1976 | US3950746 Or intrusion detection system including spring-biased switching means |
| 04/13/1976 | US3950739 Detector for detecting and locating the source of a contaminating gas or smoke in the atmosphere |
| 04/06/1976 | US3949390 High voltage aerosol detector |
| 03/23/1976 | US3946374 Rate-of-change combustion and contamination detection device |
| 03/23/1976 | US3946241 Light detector with pulsed light source and synchronous data gating |
| 03/16/1976 | US3944859 Bridge-balance detection circuit |
| 03/09/1976 | US3943499 Portable fire detector |
| 02/24/1976 | US3940753 Detection of presence or absence of flames |
| 02/10/1976 | US3938115 Combination smoke and heat detector alarm |
| 02/10/1976 | US3938114 Gas-powered alarm with pressure responsive remote indicator circuit |
| 02/03/1976 | US3936814 Smoke detector and alarm |
| 01/27/1976 | US3935492 Ionization smoke detector |
| 01/27/1976 | US3935466 Smoke detector adapted to a smoke sensing apparatus |
| 01/27/1976 | US3935465 Ionization analyzing air pollution, smoke and fire alarm device |
| 01/20/1976 | US3934145 Ionization smoke detector and alarm system |
| 01/13/1976 | US3932851 Aerosol detector |
| 01/13/1976 | US3932850 Warning device |
| 01/13/1976 | US3931785 Automatic fire alarm |
| 01/06/1976 | US3931521 Dual spectrum infrared fire detector |