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:
May. 23, 1989
Filed:
Apr. 26, 1988
Matsuo Yomogida, Miyagi, JP;
Tohoku Ricoh Co., Ltd., Miyagi, JP;
Abstract
Disclosed is a bar-code reading apparatus including a peak hold circuit for converting an analog signal which is obtained by reading a bar code into a digital signal, wherein the peak hold circuit generates an original signal corresponding to the analog signal, a first comparison signal, the peak value of which is compared with the original signal to determine a changing point from black to white, and a second comparison signal, the peak value of which is compared with the original signal to determine a changing point from white to black, and the peak hold circuit independently shifts levels of the first and second comparison signals with respect to the original signal, thereby eliminating noise components which are included in the bar code.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile