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Bar code error scanner

  • US 5,767,498 A
  • Filed: 09/17/1996
  • Issued: 06/16/1998
  • Est. Priority Date: 09/17/1996
  • Status: Expired due to Term
First Claim
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1. A method of scanning a bar code having a plurality of alternating bars and spaces of varying widths comprising:

  • scanning said bar code sequentially across said bars and spaces for providing a bar code signature;

    measuring said bar and space widths in said signature as multiples of a minimum width module; and

    detecting a fractional width in adjoining ones of said bars and spaces for detecting error in said bar code.

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