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Bar codes and methods

  • US 5,563,401 A
  • Filed: 01/03/1995
  • Issued: 10/08/1996
  • Est. Priority Date: 01/03/1995
  • Status: Expired due to Term
First Claim
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1. A product marking for use in encoding identification or associated information on an article of manufacture comprising:

  • a) a first scannable code comprising a plurality of alternating light and dark electro-optically scannable marking elements arranged to be scanned sequentially in a first direction by a laser beam and an electro-optical detector of radiation reflected from said elements; and

    b) a second scannable code defining auxiliary coded information within at least one of said marking elements of said first code with said second code being arranged to be scanned by a transducer in a second direction generally perpendicular to the first direction in which said first code is scanned.

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