KNOGO NORTH AMERICA INC.

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Patent Activity in the Last 10 Years

Technologies

Intl Class Technology Matters Rank in Class
 
  
 
G08B SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS 292
 
  
 
B32B LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM1156
 
  
 
H01F MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES 183

Top Patents (by citation)

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Recent Publications

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5401584 Surveillance marker and method of making sameSep 10, 93Mar 28, 95[B32B]
5264829 Method and apparatus for theft detection using digital signal processingJun 15, 92Nov 23, 93[G08B]
5225807 Method and apparatus for sensitizing and desensitizing targets for electronic article surveillance systemsSep 16, 91Jul 06, 93[G08B, H01F]

Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5847650 Theft resistant circuit assemblyExpiredOct 04, 96Dec 08, 98[G08B]
5304983 Multiple pulse responder and detection system and method of making and using sameExpiredDec 04, 91Apr 19, 94[G08B]
5206626 Stabilized article surveillance responderExpiredDec 24, 91Apr 27, 93[G08B]
5146204 Theft detection apparatus and flattened wire target and method of making sameExpiredDec 20, 90Sep 08, 92[G08B]
5126720 Method and apparatus for deactivating magnetic targetsExpiredJan 17, 91Jun 30, 92[G08B]
5121103 Load isolated article surveillance system and antenna assemblyExpiredJul 29, 88Jun 09, 92[G08B]
5088165 Theft deterrent fastener and fastener assemblyExpiredAug 28, 90Feb 18, 92[A44B]
5029291 Electromagnetic sensor element and methods and apparatus for making and using sameExpiredApr 10, 90Jul 02, 91[G08B]
4987754 Magnetically releasable target lockExpiredJan 12, 90Jan 29, 91[E05B]
4870391 Multiple frequency theft detection systemExpiredApr 05, 88Sep 26, 89[G08B, H01Q]
4751500 Detection of unauthorized removal of theft detection target devicesExpiredFeb 10, 87Jun 14, 88[G08B]
4700179 Crossed beam high frequency anti-theft systemExpiredJul 11, 86Oct 13, 87[G08B]
4684930 Method and apparatus for deactivating targets used in electromagnetic type article surveillance systemsExpiredMar 18, 86Aug 04, 87[G08B]
4665387 Method and apparatus for target deactivation and reactivation in article surveillance systemsExpiredJul 13, 83May 12, 87[G08B]
4642613 Electronic theft detection apparatus with responder elements on protected articlesExpiredMar 16, 84Feb 10, 87[G08B]
4623877 Method and apparatus for detection of targets in an interrogation zoneExpiredJun 30, 83Nov 18, 86[G08B]
4590461 Tamper resistant target wafer and fastener assemblyExpiredOct 05, 84May 20, 86[G08B, A44B]
4568921 Theft detection apparatus and target and method of making sameExpiredJul 13, 84Feb 04, 86[G08B]
4531264 Theft detection system target fastenerExpiredJul 27, 83Jul 30, 85[A44B]
4476459 Theft detection method and apparatus in which the decay of a resonant circuit is detectedExpiredOct 23, 81Oct 09, 84[G08B]

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