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Dual layered card for permitting selective access to an object

  • US 4,811,844 A
  • Filed: 08/06/1986
  • Issued: 03/14/1989
  • Est. Priority Date: 09/14/1983
  • Status: Expired due to Term
First Claim
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1. A device for controlling access to an object comprising two sheets of material disposed in an overlapping relation, said sheets being separably bonded together such that said sheets are capable of being separated substantially only with a tool whereby access to the object is permitted, at least one of said sheets bearing at least one machine readable code.

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