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:
Dec. 28, 1976
Filed:
Apr. 11, 1975
Applicant:
Inventors:
Tokuichi Tunekawa, Yokohama, J;
Takehiko Kiyohara, Zama, J;
Masanori Uchidoi, Kanagawa, J;
Tetsuya Taguchi, Kanagawa, J;
Yukio Mashimo, Tokyo, J;
Yusuke Ono, Tokyo, J;
Assignee:
Canon Kabushiki Kaisha, Tokyo, J;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 24 ; 354 51 ; 354 / ;
Abstract
An exposure control apparatus which can set accurate shutter speed constantly irrespective of changes in ambient temperature and which can eliminate not only an error in shutter speed caused by an expansion semiconductor element but also an error in shutter speed caused by the variation in output characteristics due to variation in temperature of a compression circuit.
Tunekawa, Tokuichi. (1976). Temperature compensated exposure control apparatus for a camera (U.S. Patent No. 4000498). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4000498
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile