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KNOGO CORP
US32 patents
Top patents by PatentIndex Score
US5126720AJun 30, 1992
Method and apparatus for deactivating magnetic targets
KNOGO CORP56 citations95
US4870391ASep 26, 1989
Multiple frequency theft detection system
KNOGO CORP84 citations95
US4751500AJun 14, 1988
Detection of unauthorized removal of theft detection target devices
KNOGO CORP57 citations95
US4590461AMay 20, 1986
Tamper resistant target wafer and fastener assembly
KNOGO CORP78 citations95
US4095214AJun 13, 1978
Electronic monitoring system and responder device
KNOGO CORP66 citations95
US4074249AFeb 14, 1978
Magnetic detection means
KNOGO CORP59 citations95
US5088165AFeb 18, 1992
Theft deterrent fastener and fastener assembly
KNOGO CORP57 citations94
US5225807AJul 6, 1993
Method and apparatus for sensitizing and desensitizing targets for electronic article surveillance systems
KNOGO CORP39 citations92
US4531264AJul 30, 1985
Theft detection system target fastener
KNOGO CORP36 citations92
US4384281AMay 17, 1983
Theft detection apparatus using saturable magnetic targets
KNOGO CORP54 citations92
US4274090AJun 16, 1981
Detection of articles in adjacent passageways
KNOGO CORP45 citations92
US4118693AOct 3, 1978
Method and apparatus for producing uniform electromagnetic fields in an article detection system
KNOGO CORP67 citations92
US4684930AAug 4, 1987
Method and apparatus for deactivating targets used in electromagnetic type article surveillance systems
KNOGO CORP39 citations91
US4665387AMay 12, 1987
Method and apparatus for target deactivation and reactivation in article surveillance systems
KNOGO CORP46 citations91
US4476459AOct 9, 1984
Theft detection method and apparatus in which the decay of a resonant circuit is detected
KNOGO CORP40 citations91
US4016553AApr 5, 1977
Article detection system with near field electromagnetic wave control
KNOGO CORP75 citations91
US5401584AMar 28, 1995
Surveillance marker and method of making same
KNOGO CORP38 citations90
US4987754AJan 29, 1991
Magnetically releasable target lock
KNOGO CORP62 citations90
US4568921AFeb 4, 1986
Theft detection apparatus and target and method of making same
KNOGO CORP50 citations90
US4135184AJan 16, 1979
Electronic theft detection system for monitoring wide passageways
KNOGO CORP122 citations90
US5121103AJun 9, 1992
Load isolated article surveillance system and antenna assembly
KNOGO CORP35 citations88
US4326198AApr 20, 1982
Method and apparatus for the promotion of selected harmonic response signals in an article detection system
KNOGO CORP50 citations88
US5029291AJul 2, 1991
Electromagnetic sensor element and methods and apparatus for making and using same
KNOGO CORP30 citations87
US4623877ANov 18, 1986
Method and apparatus for detection of targets in an interrogation zone
KNOGO CORP73 citations86
US5206626AApr 27, 1993
Stabilized article surveillance responder
KNOGO CORP30 citations84
US4321586AMar 23, 1982
Article theft detection
KNOGO CORP28 citations81
US4187509AFeb 5, 1980
Wafer and fastener for use in electronic theft detection system
KNOGO CORP35 citations81
US5146204ASep 8, 1992
Theft detection apparatus and flattened wire target and method of making same
KNOGO CORP18 citations73
US4299040ANov 10, 1981
Fastening means
KNOGO CORP18 citations73
US5304983AApr 19, 1994
Multiple pulse responder and detection system and method of making and using same
KNOGO CORP10 citations72
US5264829ANov 23, 1993
Method and apparatus for theft detection using digital signal processing
KNOGO CORP13 citations71
US4642613AFeb 10, 1987
Electronic theft detection apparatus with responder elements on protected articles
KNOGO CORP5 citations46