Inventor
COOPER MICHAEL N
US12 patents
⚠️ This page may combine multiple inventors who share the name “COOPER MICHAEL N”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
KNOGO CORP
10 patentsUS4870391ASep 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
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
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
US5121103AJun 9, 1992
Load isolated article surveillance system and antenna assembly
KNOGO CORP35 citations88
US5029291AJul 2, 1991
Electromagnetic sensor element and methods and apparatus for making and using same
KNOGO CORP30 citations87
US4321586AMar 23, 1982
Article theft detection
KNOGO CORP28 citations81