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Credential

  • US 3,279,826 A
  • Filed: 05/27/1964
  • Issued: 10/18/1966
  • Est. Priority Date: 05/27/1964
  • Status: Expired due to Term
First Claim
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1. AN IDENTIFICATION CREDENTIAL COMPRISING THE FOLLOWING:

  • (1) A FLUORESCENT ELEMENT;

    (2) A CODE CONTAINING MARKINGS SUCH AS WORDS, SYMBOLS OR THE LIKE WHICH CODE COMPRISES A SCREENING ELEMENT AND (3) A BODY BEARING IDENTIFICATION DATA EMBEDDED IN A TRANSPARENT FILM, SAID SCREENING ELEMENT CO-ACTING WITH SAID FLUORESCENT ELEMENT TO AFFORD VISIBILITY OF SAID CODE FOR SAID IDENTIFICATION CREDENTIAL, SAID SCREENING ELEMENT AFFORDING A MATERIAL IMPERVIOUS TO ULTRAVIOLET RAYS AND SAID IMPERVIOUS MATERIAL BEING INVISIBLE UNDER ORDINARY LIGHT BUT VISIBLE WHEN VIEWED UNDER ULTRAVIOLET LIGHT AGAINST THE FLUROESCENT BACKGROUND AFFORDED BY THE SAID FLUORESCENT ELEMENT.

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