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THERMOCHROMIC BAR CODE

  • US 20020056756A1
  • Filed: 12/03/1999
  • Published: 05/16/2002
  • Est. Priority Date: 12/06/1997
  • Status: Active Grant
First Claim
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1. A method of producing a bar code, comprising:

  • (a) any base bar code printed in a usual and customary manner, and (b) at least one module printed with a thermochromic material within said base bar code, whereby, the storage temperature of said bar code can be determined when said bar code is scanned by a bar code reader and, whereby, a plurality of codes can be incorporated into the space of a single bar code.

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