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:
Jul. 10, 1990
Filed:
Feb. 13, 1989
Tatsuo Inabata, Kunitachi, JP;
Olympus Optical Co., Ltd., Tokyo, JP;
Abstract
A finder optical system for cameras comprises a Porro prism, a mirror assembly, or a compound assembly of a mirror and a prism which includes four reflecting surfaces for erecting an image formed through an imaging optical system and which can take out light for photometry from one of the reflecting surfaces. The finder optical system can bring about always constant photometric distribution without the increase of components in number, can make the correction of parallax to be required, and can be manufactured in small size and at low cost.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile