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:
Jul. 05, 1977
Filed:
Apr. 16, 1974
Applicant:
Inventors:
Assignee:
Canon Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354126 ; 354139 ; 354149 ;
Abstract
The present invention refers to an apparatus for taking photographs of an object in close proximity by means of a flash. A proper exposure is obtained for the object in close proximity with the use of flash equipment with variable illumination intensity, in accordance with the equation ##EQU1## L: Distance to the object M: Photographic magnification
Ohtaki, Shohei. (1977). Apparatus for taking photographs of an object in close proximity by (U.S. Patent No. 4034387). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4034387
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile