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Method for controlling access to recorded data

  • US 4,677,604 A
  • Filed: 02/04/1985
  • Issued: 06/30/1987
  • Est. Priority Date: 02/04/1985
  • Status: Expired due to Fees
First Claim
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1. A visual display system for aiding pilots comprising:

  • a data storage medium encoded with a data base indicative of a multiplicity of flight related visual displays;

    a code provided on a separate medium applied to a surface of said data storage medium, the code identifying a subset of said data base to which user access is to be restricted;

    reading means for reading said code and said data base from said record storage medium;

    display means for reading said code and said data base from said record storage medium;

    display means generating visula displays; and

    access controller means operatively disposed between said reading means and said display means and responsive to said code for restricting said visual displays to ones identified by said code.

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