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Counterfeit resistant label and method of making the same

  • US 4,889,365 A
  • Filed: 04/11/1988
  • Issued: 12/26/1989
  • Est. Priority Date: 04/11/1988
  • Status: Expired due to Term
First Claim
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1. A label system for impeding counterfeiting comprising:

  • a substrate defining a label base having one side for attachment to a product or packaging therefore and an opposite product identification side;

    visible indicia on said product identification side for providing product identification to a viewer of said product identification side;

    additional indicia of a first color printed on said product identification side with an ink that will be visible when illuminated with light of a frequency outside of the visible spectrum, said additional indicia being in the form of several discrete marks at less than all of a plurality of predetermined locations on said opposite side to define a selected code word from a family of code words, each code word designating at least one different bit of information;

    a mask means on said product identification side masking the presence of said discrete marks except when illuminated with said light of a frequency outside the visible spectrum.

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