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CONTROLLED ACCESS SYSTEMS

  • US 3,857,018 A
  • Filed: 12/07/1973
  • Issued: 12/24/1974
  • Est. Priority Date: 12/07/1973
  • Status: Expired due to Term
First Claim
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1. A system for security control of a desired operation comprising:

  • a series of identification cards having individually distinct but nondiscrete information as a part of each card;

    means for programming said system with a system program to read a random selection of information from the cards;

    input means for entering the system program and for enabling a user to enter memorized information into the system;

    information sensing means to read the random selection of information in accordance with the system program;

    means for comparing the memorized information to the randomly selected information obtained from the cards to determine whether or not they are identical; and

    means for implementing the desired operation if the memorized information and the randomly selected information are identical.

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