The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 04, 2006
Filed:
Jan. 26, 2004
Isao Iwaguchi, Inagi, JP;
Hideo Miyazawa, Inagi, JP;
Mitsuo Watanabe, Inagi, JP;
Kozo Yamazaki, Inagi, JP;
Masanori Ohkawa, Inagi, JP;
Isao Iwaguchi, Inagi, JP;
Hideo Miyazawa, Inagi, JP;
Mitsuo Watanabe, Inagi, JP;
Kozo Yamazaki, Inagi, JP;
Masanori Ohkawa, Inagi, JP;
Fujitsu Limited, Kawasaki, JP;
Fujitsu Frontech Limited, Tokyo, JP;
Abstract
In an optical bar-code reader, an optical scanner optically scans a bar code to obtain optical power of light reflected from white bars and black bars of the bar code, a differentiation unit calculates a differential of the optical power to obtain a differential waveform, a dividing unit divides the differential waveform into a positive waveform and a negative waveform, a bar-code correcting unit calculates correct widths of black bars in the bar code from the positive waveform and the negative waveform to create corrected bar-code data, and a converter converts the corrected bar-code data into character data that is an array of numerals and alphabets.