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. 12, 1980
Filed:
Aug. 05, 1977
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ;
U.S. Cl.
CPC ...
354225 ; 352171 ; 354289 ;
Abstract
An optical system for forming a view-finder image in combination with an image of exposure condition indicia as applied to a cinematographic camera includes a first image plane at which a focusing screen lies with the exposure condition indicia located at a desired large distance from the finder field of view, and a prism positioned ahead of a second image plane at which both the images are erected, and oriented so that the image of the indicia can be seen immediately adjacent the finder field of view by a photographer looking through an ocular of the system.
Sato, Yasuhisa. (1980). Photographic camera with an image of exposure condition indicia visible (U.S. Patent No. 4217050). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4217050
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