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Machine-readable symbol and related method

  • US 7,188,778 B2
  • Filed: 03/12/2004
  • Issued: 03/13/2007
  • Est. Priority Date: 09/17/2001
  • Status: Expired due to Fees
First Claim
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1. A machine readable symbol, comprising:

  • a data field comprised of a plurality of data cells, each data cell being assigned a color corresponding to a data pattern value, a finder pattern value or an overlapping data pattern value and finder pattern value;

    wherein a finder pattern is discernable when the symbol is subjected to a first color filter means; and

    wherein a data pattern is discernable when the symbol is subjected to a second color filter means.

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