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Copy restrictive system using microdots to restrict copying of color-reversal documents

  • US 5,864,742 A
  • Filed: 04/11/1997
  • Issued: 01/26/1999
  • Est. Priority Date: 04/11/1997
  • Status: Expired due to Fees
First Claim
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1. A system for restricting the copying of a color-reversal document comprising:

  • means for embedding one or more microdots into a color-reversal document;

    detecting means for detecting the presence of one or more of the microdots in said color-reversal document; and

    controlling means responsive to said detecting means for restricting a copy machine from copying the color-reversal document when a microdot is detected.

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