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:
Mar. 15, 2005
Filed:
Dec. 29, 1995
Applicants:
Takeshi Koyama, Kanagawa-ken, JP;
Yasunori Murata, Tokyo, JP;
Inventors:
Takeshi Koyama, Kanagawa-ken, JP;
Yasunori Murata, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B023/00 ; G02B005/04 ;
U.S. Cl.
CPC ...
Abstract
A compact magnification-varying viewfinder optical system includes an objective lens unit for forming a primary image, the objective lens unit having at least one curved reflection surface arranged to reflect a light flux and a lens surface, and an eyepiece lens unit for observing the primary image, wherein an optical power is imparted to the curved reflection surface.
Koyama, Takeshi. (2005). Viewfinder optical system (U.S. Patent No. 6867916). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/6867916
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile