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:
Aug. 31, 1982
Filed:
Jan. 30, 1981
Applicant:
Inventors:
Makoto Katsuma, Yokohama, JP;
Masayuki Suzuki, Tokyo, JP;
Kenichi Shinbori, Yokohama, JP;
Hiroyasu Murakami, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354152 ; 354200 ;
Abstract
In a single lens reflex camera a focusing screen is removably attached with a focusing screen fitting member unitarily formed therewith for fitting the focusing screen in the camera body with a spring being provided therebetween to form a focusing screen unit. The focusing screen fitting member is provided with a clamp holder portion for engagement with an interchanging tool for use in attaching and detaching the focusing screen unit to and from the camera body, whereby the interchanging operation of the focusing screen may be performed with ease and safety.