Bar code reading method and apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Jul 12, 1988
Grant Date -
N/A
app pub date -
Oct 17, 1985
filing date -
Oct 24, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A bar code reading method and apparatus. Comparison reference values are calculated based upon actual measurements of the width of bars and spaces which comprise the bar code pattern and upon a prestored constant. The measured bar and space widths are compared to the reference values to determine the information represented by the bar code. Since the reference values are generated from the measured values of the bars and spaces the scanning speed is irrelevant and errors are avoided. Similarly, minor width variations, caused by inaccurate printing, between like bars or spaces do not affect reading results.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully