|
| US4010459 | 5 nov. 1975 | 1 mars 1977 | Borge Schloger Oluf Tvede-Jensen Erik Landert Hans Borge Hansen Niels Ove Wrist | Systems for the detection of moving objects within a survey area by microwave diffraction |
| US4087814 | 27 déc. 1976 | 2 mai 1978 | | Intruder alarm systems |
| US4141091 | 10 déc. 1976 | 27 févr. 1979 | | Automated flush system |
| US4331952 | 22 sept. 1980 | 25 mai 1982 | American District Telegraph Company | Redundant sensor adapter |
| US4401976 | 14 janv. 1981 | 30 août 1983 | | Multiple sensor interconnected alarm system responsive to different variables |
| US4710750 | 5 août 1986 | 1 déc. 1987 | C & K Systems, Inc. | Fault detecting intrusion detection device |
| US4833450 | 15 avr. 1988 | 23 mai 1989 | Napco Security Systems, Inc. | Fault detection in combination intrusion detection systems |
| US4940967 | 31 août 1989 | 10 juil. 1990 | Burle Technologies, Inc. | Balanced digital infrared detector circuit |
| US4942384 | 31 mars 1989 | 17 juil. 1990 | Matsushita Electric Works, Ltd. | Composite type crime preventive sensor |
| US5189393 | 7 juin 1991 | 23 févr. 1993 | The Watt Stopper Inc. | Dual technology motion sensor |
| US5475365 | 2 déc. 1994 | 12 déc. 1995 | C & K Systems, Inc. | Methods and apparatus for intrusion detection having improved immunity to false alarms |
| US5581236 | 1 juil. 1994 | 3 déc. 1996 | C & K Systems, Inc. | Methods and apparatus for intrusion detection having improved immunity to false alarms |
| US5821642 | 4 nov. 1996 | 13 oct. 1998 | Hubbell Incorporated | Arc prevention circuit for a mechanical switch |
| US5986357 | 4 févr. 1997 | 16 nov. 1999 | Mytech Corporation | Occupancy sensor and method of operating same |
| US6078253 | 15 oct. 1997 | 20 juin 2000 | Mytech Corporation | Occupancy sensor and method of operating same |
| US6415205 | 26 août 1999 | 2 juil. 2002 | Mytech Corporation | Occupancy sensor and method of operating same |
| US6538570 | 22 juin 2000 | 25 mars 2003 | Honeywell International | Glass-break detector and method of alarm discrimination |
| US7113092 | 12 nov. 2003 | 26 sept. 2006 | QinetiQ Limited | Ferromagnetic object detector |
| US7194209 | 21 août 2003 | 20 mars 2007 | Xantech Corporation | Interference resistant infrared extension system |
| US7411489 | 1 juil. 2005 | 12 août 2008 | Cooper Wiring Devices, Inc. | Self-adjusting dual technology occupancy sensor system and method |
| US7486193 | 6 févr. 2006 | 3 févr. 2009 | Cooper Technologies Company | Occupancy sensor network |
| US7489128 | 11 mars 2002 | 10 févr. 2009 | | MRI protector |
| US7541924 | 6 févr. 2006 | 2 juin 2009 | Cooper Technologies Company | Infrared occupancy sensor |
| US7680283 | 7 févr. 2005 | 16 mars 2010 | Honeywell International Inc. | Method and system for detecting a predetermined sound event such as the sound of breaking glass |
| US7777632 | 6 févr. 2006 | 17 août 2010 | Cooper Technologies Company | Acoustic occupancy sensor |
| US8044336 | 1 févr. 2006 | 25 oct. 2011 | Pyronix Limited | Detector and optical system |
| US8063375 | 22 juin 2007 | 22 nov. 2011 | Intel-GE Care Innovations LLC | Sensible motion detector |
| US8148989 | 27 janv. 2009 | 3 avr. 2012 | | Ferromagnetic detection enhancer compatible with magnetic resonance |
| US8164437 | 2 févr. 2006 | 24 avr. 2012 | Pyronix Limited | Detection apparatus |
| USRE33824 | 30 oct. 1989 | 18 févr. 1992 | | Fault detecting intrusion detection device |