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. 25, 1998
Filed:
Jan. 08, 1997
Takashi Saegusa, Kawasaki, JP;
Hisatoshi Fujiwara, Koganei, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A battery check device which assesses a state of exhaustion of a battery installed in a camera, and which can accurately assess at any time the state of exhaustion of the battery according to the drive state of a camera mechanism, such as a mirror. The battery check device includes a voltage detection device to detect the voltage of the camera battery, a drive detection device to detect the required time needed to drive the camera mechanism, a memory in which is stored the required time detected by the drive detection device, and a calculating device which inputs the battery voltage detected by the voltage detection device and the required time which has been recorded in the memory, and calculates a degree of exhaustion of the battery corresponding to these values. A display then displays the degree of exhaustion of the battery which has been found by the calculating device.