Esselte Security Systems AB

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
5164601 Method and apparatus for detecting marks on a paper web, using alternate set point values indicative of light intensity to identify marks and non-marksExpiredDec 18, 90Nov 17, 92[G06K]
4627218 Method of automatically banderoling bundled sheet objects and apparatus for carrying out the methodExpiredJul 09, 85Dec 09, 86[B65B]
4590366 Method of securing simple codesExpiredJun 28, 84May 20, 86[G06K]
4581918 Apparatus for non-contact thickness gauging of disc or sheet objectsExpiredJan 09, 84Apr 15, 86[G01B]
4581482 Method and device for signature verificationExpiredJun 28, 84Apr 08, 86[G08C]

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