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:
Apr. 03, 1979
Filed:
Jun. 08, 1977
Hiroshi Iwata, Osaka, JP;
Tetsuo Yamaoka, Osaka, JP;
West Electric Company, Ltd., Osaka, JP;
Abstract
In a flash camera having a zone-focusing system and an electronic flash device in one united body, wherein the flash camera comprises an electro-luminescence device for emitting light by AC output fed from a DC-DC converter circuit in the electronic flash device, an indicator having symbol marks for indicating an object distance and illuminated by the electro-luminescence device, and a pointer, linked to a focus-adjusting device for adjusting focus of the main photographic lens of the camera, for pointing the symbol marks on the indicator. The symbol marks can be easily identified through the illumination by the electro-luminescence device and further a voltage decrease of power source battery in the DC-DC converter circuit can be easily and clearly observed.