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:
Feb. 22, 2000
Filed:
Jan. 21, 1997
Toshiyuki Kumakura, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
A camera which uses a film cartridge having a magnetic recording part for each frame portion thereof and writes magnetic information in the magnetic recording part of each frame, in rewinding the film after completion of photographing on all frames, is arranged to effectively prevent information from being recorded again at the time of rewinding the film for any frame having magnetic information already recorded in a case where the film cartridge loaded into the camera contains a film in which part of frames have been already exposed. In the camera, when a film cartridge having some of film frames already exposed is loaded, the camera stores the position of a leading unexposed frame and to permit recording of magnetic information up to the leading unexposed frame in performing the recording action at the time of film rewinding.