Assignee
CERBERUS AG
CH133 patents
Top patents by PatentIndex Score
US6006585ADec 28, 1999
Optoacoustic gas sensor
CERBERUS AG124 citations97
US5451931ASep 19, 1995
Optical smoke detector
CERBERUS AG123 citations97
US4390869AJun 28, 1983
Gas sensing signaling system
CERBERUS AG87 citations96
US3940753AFeb 24, 1976
Detection of presence or absence of flames
CERBERUS AG56 citations96
US4627269ADec 9, 1986
Method of, and apparatus for, detecting reducing gases in a gas mixture
CERBERUS AG56 citations95
US4447726AMay 8, 1984
Passive infrared intrusion detector
CERBERUS AG60 citations95
US5424718AJun 13, 1995
IR intrusion detector using scattering to prevent false alarms
CERBERUS AG53 citations94
US5381130AJan 10, 1995
Optical smoke detector with active self-monitoring
CERBERUS AG71 citations94
US4746910AMay 24, 1988
Passive infrared intrusion detector employing correlation analysis
CERBERUS AG118 citations94
US4179691ADec 18, 1979
Infrared intrusion detector circuit
CERBERUS AG65 citations94
US5243330ASep 7, 1993
Fire detector system and method
CERBERUS AG30 citations92
US4880980ANov 14, 1989
Intrusion detector
CERBERUS AG25 citations92
US4709152ANov 24, 1987
Infrared intrusion detector
CERBERUS AG37 citations92
US4668635AMay 26, 1987
Method of detecting reative gases in a gas mixture
CERBERUS AG47 citations92
US4584867AApr 29, 1986
Device for selectively determining the components of gas mixtures by means of a gas sensor
CERBERUS AG51 citations92
US4579751AApr 1, 1986
Method of producing constituent materials for gas sensors
CERBERUS AG33 citations92
US4379290AApr 5, 1983
Alarm device with a condition sensor element
CERBERUS AG28 citations92
US4356478AOct 26, 1982
Employing a shape memory alloy in a fire alarm temperature sensitive element
CERBERUS AG37 citations92
US5753797AMay 19, 1998
Photo-acoustic gas sensor and its manufacture and use
CERBERUS AG66 citations91
US5523744AJun 4, 1996
Device for testing the operation of smoke detectors
CERBERUS AG41 citations91
US4847488AJul 11, 1989
Sabotage resistant light barrier wherein radiation is polarized into two opposite types of polarization
CERBERUS AG24 citations91
US4559453ADec 17, 1985
Smoke detector with a radiation source operated in a pulse-like or intermittent mode
CERBERUS AG30 citations91
US4547675AOct 15, 1985
Smoke detector operating according to the radiation extinction principle
CERBERUS AG31 citations91
US4429224AJan 31, 1984
Optical arrangement for an infrared intrusion detector
CERBERUS AG50 citations91
US4087688AMay 2, 1978
Infrared radiation-burglary detector
CERBERUS AG51 citations91
US4081680AMar 28, 1978
Infrared radiation-burglary detector
CERBERUS AG52 citations91
US5021766AJun 4, 1991
Intrusion detection system
CERBERUS AG36 citations90
US4906978AMar 6, 1990
Optical smoke detector
CERBERUS AG69 citations90
US4772797ASep 20, 1988
Ceiling mounted passive infrared intrusion detector with prismatic window
CERBERUS AG27 citations90
US4642471AFeb 10, 1987
Scattered radiation smoke detector
CERBERUS AG38 citations90
US4418335ANov 29, 1983
Infrared intrusion detector with pyroelectric sensor and charge amplifier
CERBERUS AG39 citations90
US4181439AJan 1, 1980
Smoke detector with a conical ring-shaped radiation region
CERBERUS AG42 citations90
US4175865ANov 27, 1979
Smoke detector
CERBERUS AG34 citations90
US5942976AAug 24, 1999
Passive infrared intrusion detector and its use
CERBERUS AG47 citations89
US5928344AJul 27, 1999
Serial data bus and use thereof
CERBERUS AG24 citations89
US5659316AAug 19, 1997
Signal evaluation circuit for a motion detector
CERBERUS AG20 citations89
USD342213SDec 14, 1993
Fire detector
CERBERUS AG21 citations89
US4551710ANov 5, 1985
Method and apparatus for reporting dangerous conditions
CERBERUS AG30 citations89
US4543815AOct 1, 1985
Device for the detection of foreign components in a gas and an application of the device
CERBERUS AG41 citations89
US3994603ANov 30, 1976
Detection system to determine the transmissivity of a medium with respect to radiation, particularly the light transmissivity of smoke-contaminated air, for fire detection
CERBERUS AG51 citations89
US5005003AApr 2, 1991
Method of detecting fire in an early stage
CERBERUS AG22 citations88
US4612534ASep 16, 1986
Method of transmitting measuring values in a monitoring system
CERBERUS AG29 citations88
US4757204AJul 12, 1988
Ceiling mounted passive infrared intrusion detector with dome shaped lens
CERBERUS AG51 citations87
US4568919AFeb 4, 1986
Monitoring system including a number of measuring stations series connected to a signal line
CERBERUS AG27 citations87
US5218345AJun 8, 1993
Apparatus for wide-area fire detection
CERBERUS AG38 citations86
US4991123AFeb 5, 1991
Alarm system
CERBERUS AG44 citations86
US5841017ANov 24, 1998
Photo-acoustic gas sensor
CERBERUS AG46 citations85
US4567475AJan 28, 1986
Gas or vapor alarm system including scanning gas sensors
CERBERUS AG37 citations85
US4074341AFeb 14, 1978
Interlocked separable fire sensor construction
CERBERUS AG35 citations85
US5497144AMar 5, 1996
Testing and adjustment of scattered-light smoke detectors
CERBERUS AG51 citations84
Showing the top 50 of 133 patents by PatentIndex Score.