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. 14, 1979
Filed:
Jul. 12, 1977
Applicant:
Inventor:
Katsuhiko Miyata, Omiya, JP;
Assignee:
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354 / ; 354 56 ; 354 59 ; 354152 ; 354241 ;
Abstract
The shutter curtain surface(s) in a single lens reflex camera on the side facing the lens is roughened, as by sand blasting, to provide more uniform light diffusion and reflective scattering characteristics, whereby the output of a light sensing element disposed in the mirror box facing the shutter provides a more accurate measure of the integrated or averaged light intensity distribution over the entire picture or viewing frame.
Miyata, Katsuhiko. (1979). Roughened shutter curtain(s) for single lens reflex camera (U.S. Patent No. 4164368). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4164368
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile