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:
Apr. 09, 1985
Filed:
Jan. 31, 1983
Applicant:
Inventors:
Makoto Katsuma, Kanagawa, JP;
Akira Hiramatsu, Kanagawa, JP;
Kazuhiko Arakawa, Tokyo, JP;
Hiroyasu Murakami, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354473 ; 354478 ; 354481 ; 3542891 ;
Abstract
At least one electro-optical light shielding member is disposed close to a reticle of a photographic camera arranged for forming an image of an object to be photographed. The light shielding member is electrically controlled to have the reticle partly light-shielded by the light shielding pattern of the light shielding member in such a manner as to permit selection between an averaging light measuring mode and a spot light measuring mode.