| 摘要 |
<p>An improved form of credit or identification card and a system for verifying the propriety of ownership thereof. the card comprises, in addition to the conventional embossed indicia which ordinarily includes a name and an account number, a laminated or encapsulated center layer of material upon which is deposited an electrical circuit consisting of a matrix of electrical conductors and semiconductors coupled to a plurality of contact points. At least three of the contact points are coupled to certain ones of the semiconductor devices thereby providing a code number unique to each card and the remaining contacts are coupled to other parts of the circuit to give a false code. A card verifier has a like plurality of electrical contacts adapted to engage the card contacts and a plurality of selectors for selectively coupling the circuit in the card with a circuit in the verifier so as to produce a YES or NO output signal to verify selection of the proper code number.</p> |
