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:
Aug. 26, 1986
Filed:
Apr. 26, 1985
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G08B / ;
U.S. Cl.
CPC ...
354468 ; 320 48 ; 340636 ; 354484 ;
Abstract
Pulses of such frequency that an electromagnetic drive device does not operate in response thereto are produced by a pulse generating circuit. While these pulse are being applied to the electromagnetic drive device, the voltage of an electrical power source in the real load running state is detected by a battery checking circuit.