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:
Sep. 12, 1989
Filed:
Feb. 17, 1989
Applicant:
Inventor:
Kiyoshi Ikuta, Kanagawa, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G08B / ; G01N / ;
U.S. Cl.
CPC ...
354468 ; 340636 ; 324431 ;
Abstract
A battery check device for a camera which is capable of accurately making a battery check without being affected by temperature comprises detecting means for detecting the service condition of a battery; comparison means for comparing the detection value obtained by the service condition detecting means with a reference value; informing means for informing the photographer of the service capacity of the battery in response to the output of the comparison means; and changing means for changing the reference value to change thereby the informing state of the informing means according to temperature.