Assignee

CARDKEY SYSTEMS INC

US·1 granted patent·40 citations·filing 1990–1990

Technology mixG06Q1 G07C1 G07F1

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0146US5093861ARecognition apparatus and method for security systemsCARDKEY SYSTEMS INC·Filed 1990·Granted Mar 3, 1992·40 cites·29 claims

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