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:
Jun. 05, 1984
Filed:
May. 25, 1982
Applicant:
Inventors:
Michio Hirohata, Tokyo, JP;
Hideo Ikari, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
3541951 ; 3542341 ;
Abstract
A camera having a driving member to open and close shutter blades is operated to open a shutter by a force of a spring at a movement speed independently of that of a movable member at a time power is supplied to an electromagnetic driving source, the movable member operating to charge a second spring to return the shutter blade driving member, which second spring charges the first spring, the arrangement being such that the movable member can control the action of an automatic focusing mechanism.
Hirohata, Michio. (1984). Camera having an electromagnetically driven shutter (U.S. Patent No. 4452521). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4452521
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile