One-dimensional bar code symbology and method of using same

Patent 5479515 Issued on December 26, 1995. Estimated Expiration Date:

May 11, 2014. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.

Abstract Claims Description Full Text

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Inventor

Longacre, Jr., Andrew

Application

No. 241297 filed on 05/11/1994

US Classes:

380/54, BY MODIFYING OPTICAL IMAGE (E.G., TRANSMISSIVE OVERLAY)235/462.16, Bar width determination380/51Having production of printed copy (e.g., printer, typewriter)

Examiners

Primary: Cain, David

Attorney, Agent or Firm

Harris Beach & Wilcox

Foreign Patent References

0385478 EP. 05/12/1990

International Class

G09C 001/06

Abstract

A linear bar code symbology combines delta distance start and stop patterns, a space efficient, bit oriented data character structure, and Reed-Solomon redundancy for error detection and correction. A method of writing the bar code structures onto a character medium and reading the resulting symbols under adverse conditions is presented.