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Class Information
Number: 340/629
Name: Communications: electrical > Condition responsive indicating system > Specific condition > Fluent material > Particle suspension in fluid > Smoke > Ionization
Description: Subject matter wherein the smoke detector responds to ionization of the smoke caused by an applied electric field or a radioactive source.










Patents under this class:
1 2 3 4 5 6

Patent Number Title Of Patent Date Issued
8681012 Detectors Mar. 25, 2014
8624745 High sensitivity and high false alarm immunity optical smoke detector Jan. 7, 2014
8508376 Particle detector, system and method Aug. 13, 2013
8441368 Radiation guide for a detector, scattered radiation detector May. 14, 2013
8395501 Dynamic alarm sensitivity adjustment and auto-calibrating smoke detection for reduced resource microprocessors Mar. 12, 2013
8354935 Method for hushing a CO detector through power-on reset Jan. 15, 2013
8334782 Smoke detector and ionisation apparatus Dec. 18, 2012
8284065 Dynamic alarm sensitivity adjustment and auto-calibrating smoke detection Oct. 9, 2012
8138909 Portable detection system and method Mar. 20, 2012
8120501 Window with built-in devices that senses carbon monoxide and opens itself powered by light Feb. 21, 2012
8106784 Combination smoke and heat detector Jan. 31, 2012
8106785 Smoke detector Jan. 31, 2012
8098166 Variable air speed aspirating smoke detector Jan. 17, 2012
8089366 Smoke detector Jan. 3, 2012
8077018 Smoke detector Dec. 13, 2011
8054189 Life safety device with automatic battery discharge at the end of life Nov. 8, 2011
7982628 Method and system of translating developing conditions in spatial geometries into verbal output Jul. 19, 2011
7973669 Apparatus and method for wireless location sensing Jul. 5, 2011
7956764 Ambient condition detector with variable pitch alarm Jun. 7, 2011
7952486 Liquid crystal display device provided with a gas detector, gas detector and method for manufacturing a gas detector May. 31, 2011
7928853 Alarm unit Apr. 19, 2011
7821412 Smoke detector Oct. 26, 2010
7808393 Smoke detector and sampling air supplying method for smoke detector Oct. 5, 2010
7740081 Hazard detection and suppression apparatus Jun. 22, 2010
7714700 Ambient condition detector with selectable pitch alarm May. 11, 2010
7656301 Smoke detection for hardware cabinets Feb. 2, 2010
7656302 Sensing chamber with enhanced ambient atmospheric flow Feb. 2, 2010
7619538 Programmable, directing evacuation systems: apparatus and method Nov. 17, 2009
7605687 Ambient condition detector with variable pitch alarm Oct. 20, 2009
7548157 Battery backed service indicator aids for field maintenance Jun. 16, 2009
7493816 Smoke detectors Feb. 24, 2009
7482940 Alarm for detecting radiation and pollutants Jan. 27, 2009
7474227 Multiwavelength smoke detector using white light LED Jan. 6, 2009
7443307 Christmas tree ornament hazard detector Oct. 28, 2008
7405672 Air treatment device having a sensor Jul. 29, 2008
7378976 Night light and alarm detector May. 27, 2008
7369057 Power generator and power generator auxiliary monitoring May. 6, 2008
7335885 Ultra low power NDIR gas sensor fire detector Feb. 26, 2008
7312714 Ambient condition detector with time delayed function Dec. 25, 2007
7295128 Smoke detection methods, devices, and systems Nov. 13, 2007
7287738 Remotely attachable and separable coupling Oct. 30, 2007
7283057 Fire alarm spreading system and method Oct. 16, 2007
7262705 Recessed detector assembly for detecting and venting airborne substances Aug. 28, 2007
7259665 Battery backed service indicator aids for field maintenance Aug. 21, 2007
7233253 Multiwavelength smoke detector using white light LED Jun. 19, 2007
7196631 Method of utilizing existing fire alarm systems and existing smoke detectors to detect aerolized radioactive material Mar. 27, 2007
7186979 Passive NDIR carbon dioxide sensor fire detector Mar. 6, 2007
7176460 Passive NDIR gas sensor fire detector Feb. 13, 2007
7167098 Testing equipment for a fire alarm Jan. 23, 2007
7154402 Power strip with smoke detection auto-shutoff Dec. 26, 2006

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