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SECURED ACCESS USING A POSITION-CODED SYSTEM

  • US 20090308917A1
  • Filed: 09/17/2008
  • Published: 12/17/2009
  • Est. Priority Date: 06/30/1999
  • Status: Active Grant
First Claim
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1. A method for controlling access to an access-protected unit, the method comprising:

  • reading at least one absolute location from an encoded base;

    checking if the location is within a region belonging to an authorized user; and

    granting access by the authorized user to the access-protected unit if the location is within the region belonging to the authorized user, otherwise denying access; and

    wherein reading said at least one absolute location from the encoded base includes recording a pattern from the base with an optically imaging pen, and converting the recorded pattern into a location.

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