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:
Nov. 13, 1984
Filed:
Dec. 22, 1981
Applicant:
Inventor:
Ryuji Tokuda, Tokyo, JP;
Assignee:
Canon Kabushiki Kaisha, , US;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354427 ; 354460 ; 354471 ;
Abstract
A brightness warning device for a camera is disclosed, which has a warning means and a detecting circuit for detecting a charge level of the timing capacitor in the exposure amount adjusting circuit of the aforesaid camera upon attainment of the detecting level to a predetermined value to produce an output signal driving the aforesaid warning means.