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:
Mar. 12, 1991
Filed:
Dec. 05, 1989
Applicant:
Inventor:
Hiroaki Nakamura, Hachioji, JP;
Assignee:
Olympus Optical Co., Ltd., , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354415 ; 3541451 ;
Abstract
A flash device comprises a pre-flash circuit which conducts a small flash a plurality of times for reducing the pupil size in response to a camera release signal just before the commencement of the shutter opening operation and a main flash circuit for conducting flash for taking a picture after the commencement of shutter opening operation.