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. 19, 1977
Filed:
Mar. 05, 1975
Katsuhiko Miyata, Saitama, JA;
Asahi Kogaku Kogyo Kabushiki Kaisha, Tokyo, JA;
Abstract
A photometric device for use in a single lens reflex camera comprising a photometric optical system and a light receiving element disposed behind a pentaprism is disclosed. The light receiving element is disposed at a position where the image of a subject, imaged on a focusing glass plate by the photographing lens, is refocused by the photometric lenses. The light receiving area of the light receiving element is sized so that only a portion of the light refocused by the photometric lenses is received to provide a photometric operation that gives priority to a portion of the subject image.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile