DH TECHNOLOGY, INC.

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Expired/Abandoned/Withdrawn Patents

Patent # Title Status Filing Date Issue/Pub Date Intl Class
2012/0001,757 CONTAINER ELECTRONIC SEAL DEVICE WHICH CAN BE SELECTIVELY LOCKED AND UNLOCKED USING EXTERNAL MEMORY AND METHOD OF OPERATING THE SAMEAbandonedNov 24, 10Jan 05, 12[E05B]
5780828 Interactive video systemsExpiredFeb 15, 96Jul 14, 98[G11B, G06K]
5554840 Hybrid card readerExpiredMar 07, 94Sep 10, 96[G06K]
5491327 Universal magnetic medium encoder with tilt-compensating apparatusExpiredAug 10, 94Feb 13, 96[G06K]
5397886 Magnetic stripe and/or micro chip card motorized reader/encoder mechanismExpiredJun 10, 93Mar 14, 95[G06K]
5331138 Hybrid card readerExpiredNov 03, 92Jul 19, 94[G06K]
5311003 Hand-operated magnetic stripe card readerExpiredJun 05, 92May 10, 94[G06K]
5204513 Decoder for magnetic stripe recordingExpiredOct 02, 90Apr 20, 93[G06K]
5115493 Continuous laser printer for printing over page boundariesExpiredAug 15, 90May 19, 92[G06F]
5105530 Method of forming high channel density magnetic headExpiredApr 13, 90Apr 21, 92[G11B]
5101097 Hand swipe magnetic stripe encoderExpiredJun 07, 90Mar 31, 92[G06K]
5091961 Magnetic ink character decoderExpiredJul 14, 89Feb 25, 92[G06K]
4886381 Dot matrix print head assemblyExpiredMay 06, 88Dec 12, 89[B41J]
4864717 Method of making a digital magnetic head structureExpiredNov 29, 88Sep 12, 89[G11B]
4843220 Automatic data capture for multiple form point of sale slip packsExpiredMar 13, 87Jun 27, 89[G06K]
4797767 Digital magnetic head structureExpiredNov 20, 86Jan 10, 89[G11B]
4777540 Magnetic card reader with head stop arrangementExpiredMar 18, 86Oct 11, 88[G11B]
4755068 Dot matrix print head assemblyExpiredJan 30, 87Jul 05, 88[B41J]
4742213 Credit card reading apparatus with reliable optical path interrupt meansExpiredMay 23, 85May 03, 88[G06K]
4692602 Apparatus for sensing and/or writing information on cards, passports and checks and the likeExpiredMay 23, 85Sep 08, 87[G06K]

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