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:
Oct. 11, 1988
Filed:
Nov. 07, 1986
Osamu Harada, Atsugi, JP;
Souhei Ikeda, Hadano, JP;
Akio Kojima, Hadano, JP;
Yoshihisa Watanabe, Hadano, JP;
Keiichi Isozaki, Minami-ashigara, JP;
Hitachi, Ltd., Tokyo, JP;
Hitachi Computer Engineering Co., Ltd., Kanagawa, JP;
Abstract
Bar codes and auxiliary characters representative of the contents of the bar codes are printed on an article which is limited with respect to the available space in distinguishably recognizable and superposed relations. By selecting appropriately the lightness of the auxiliary characters, reflected light resulting from scanning of the bar code is converted into an electrical signal which is subsequently converted into a binary signal with the signal components due to the auxiliary characters being neglected, to thereby extract only the signal originating in the bar code. A bar code reader is provided which comprises an A/D converter for compensating the output of bar code detection due to the character pattern superposed on the bar code.