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:
Jan. 04, 1983
Filed:
Aug. 14, 1981
Applicant:
Inventors:
Katumi Terada, Hachioji, JP;
Yukio Nakajima, Kanagawa, JP;
Assignee:
Olympus Optical Company Ltd., , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354173 ; 354217 ;
Abstract
In an automatic camera, as a film roll is loaded, the film is once wound up to its terminal end in response to a signal which indicates the closure of a rear lid of the camera. During such time, the number of film perforations is counted to allow the number of film frames which are available to take pictures to be known before any pictures are taken. A display is provided which is decremented as the frames are exposed and the film is wound back, thus indicating the number of film frames remaining.