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Token having predetermined optical characteristics and a token validation device therefor

  • US 6,021,882 A
  • Filed: 03/12/1998
  • Issued: 02/08/2000
  • Est. Priority Date: 03/12/1998
  • Status: Expired due to Term
First Claim
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1. A token for use with a token operated device comprising a plurality of predetermined optical characteristics, said plurality of predetermined optical characteristics being disposed in a substantially radially symmetrical manner with respect to said token, and each of said optical characteristics having the property of a facet wherein an effective surface normal of said facet is aligned along a predetermined vector angle with an elevation angle ranging substantially between 30°

  • and 60° and

    an azimuthal angle other than substantially along a radial line of the token or substantially along a line tangent to an annular ring centered on the token such that said token operated device can validate said predetermined optical characteristics substantially independent of token orientation.

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