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Brevets

Référencé par

Brevet citant Date de dépôt Date de délivrance Cessionnaire d'origine Titre
US393285825 juil. 197413 janv. 1976Inn-TronicsMaster antenna line communication system
US393324015 oct. 197420 janv. 1976Sensormatic Electronics CorporationAnti-theft security container
US406323012 juin 197513 déc. 1977The Magnavox CompanyBalanced field theft detection system
US40877919 sept. 19742 mai 1978Minnesota Mining and Manufacturing CompanyElectromagnetically responsive device and system for detecting the same
US411746614 mars 197726 sept. 1978Beat frequency interference rejection circuit
US421534231 mars 197829 juil. 1980Intex Inc.Merchandise tagging technique
US426098311 janv. 19797 avr. 1981Tag Radionics LimitedPresence sensing detector and system for detecting a receiver/transmitter device affixed to an article
US427409019 févr. 198016 juin 1981Knogo CorporationDetection of articles in adjacent passageways
US448142819 mai 19816 nov. 1984Security Tag Systems, Inc.Batteryless, portable, frequency divider useful as a transponder of electromagnetic radiation
US47981759 oct. 198617 janv. 1989Alfa-Laval Agri, Inc.Electronic identification system
US530092229 mai 19905 avr. 1994Sensormatic Electronics CorporationSwept frequency electronic article surveillance system having enhanced facility for tag signal detection
US57867644 mars 199728 juil. 1998Voice activated electronic locating systems
US57986937 juin 199525 août 1998Electronic locating systems
US605775614 août 19982 mai 2000Electronic locating systems
US634093227 juin 200022 janv. 2002RF Code, Inc.Carrier with antenna for radio frequency identification
US63885692 mai 200014 mai 2002Electronic locating methods
US645248127 nov. 199817 sept. 2002Apparatus and operative method for detection and reading of transponders in a controlled passage
US64569581 déc. 200024 sept. 2002Ensure Technologies, Inc.Method for allowing a user access to an electronic device having improved security
US689146914 mai 200210 mai 2005Electronic locating systems
US73212969 mai 200522 janv. 2008Thomas J. EngellennerElectronic locating systems
US763337815 déc. 200515 déc. 2009RF Code, Inc.Object identification system with adaptive transceivers and methods of operation
US780836728 août 20025 oct. 2010Round Rock Research, LLCRFID material tracking method and apparatus
US790297118 janv. 20088 mars 2011Xalotroff Fund V, Limtied Liability CompanyElectronic locating systems
US812531628 août 200228 févr. 2012Round Rock Research, LLCRFID material tracking method and apparatus
USD2942345 juin 198616 févr. 1988Checkpoint Systems, Inc.Electronic article surveillance system
USD29722128 oct. 198516 août 1988Garrett Electronics, Inc.Walk-through metal detector
USD5388067 oct. 200520 mars 2007Target Brands, Inc.Radio frequency identification device enclosure