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. 10, 1981
Filed:
Sep. 28, 1979
Masaharu Kawamura, Kawasaki, JP;
Yoshihiro Shigeta, Tokyo, JP;
Canon Kabushiki Kaisha, Tokyo, JP;
Abstract
In the disclosed system, a camera of the type which manually presets a diaphragm aperture and particularly for a camera which operates with a computer flash device. For flash operation, the aperture of such a camera must be set at a value suitable for the flash device. A signal representative of an aperture value suitable for the computer flash device and a signal representative of a preset aperture value are compared and, when these two values coincide with each other, the coincidence is displayed by a display device arranged within the view finder to let the photographer know that the camera has been set at an aperture value required for flash photography.