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. 14, 1989
Filed:
Jan. 20, 1987
Applicant:
Inventors:
Shigeru Ohshima, Kanagawa, JP;
Takeshi Sekiguchi, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04P / ;
U.S. Cl.
CPC ...
358225 ; 35821313 ;
Abstract
An adapter with built-in shutter arranged to be attached between a master lens and a camera body, includes a first lens group having a negative power and disposed at a position on the master lens side of an image forming plane of the master lens, a second lens group having a positive power and arranged to receive a bundle of rays passing the first lens group, and a shutter for controlling an exposure.
Ohshima, Shigeru. (1989). Adapter with built-in shutter (U.S. Patent No. 4812911). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4812911
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile