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. 07, 1986
Filed:
Jul. 23, 1984
Hitoshi Yanagawa, Tokyo, JP;
Yasutoshi Sugita, Urayasu, JP;
Satoshi Ono, Yokohama, JP;
Masami Maetani, Ohmiya, JP;
Tomoo Tsunenari, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
An information retrieval system for retrieving desired information from information recorded in a record medium is disclosed. The information on the record medium is classified into at least two groups and a first mark is added to the lower class information and a second mark is added to the higher class information. The marks are detected by mark detection means and the feed of the record medium is controlled in accordance with the output of the mark detection means. When there is an error in the retrieval or in the input, the error is detected and the feed of the record medium is stopped.