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. 27, 1985
Filed:
Feb. 22, 1984
Applicant:
Inventor:
Nobuhiko Terui, Tokyo, JP;
Assignee:
Nippon Kogaku K.K., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ; G03B / ; G03B / ;
U.S. Cl.
CPC ...
354402 ; 354484 ; 354219 ;
Abstract
A camera system for a single lens reflex camera of a view-finder interchangeable type of a construction, wherein the interchangeable view-finder provided with a focus detection device and having a battery for the focus detection device built in it is detachably mounted on the camera body provided with an exposure meter and having a battery for the exposure meter built in it, and a battery checking device is provided on each of the view-finder device and the camera body, whereby, when the battery in the camera body is used up, the operations of the exposure meter in the camera body and the focus detection in the view-finder device are stopped.