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:
Dec. 31, 1974
Applicant:
Inventors:
Keiichi Uno, Tokyo, JA;
Mutsuhiro Inoue, Sagamihara, JA;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
353 82 ; 353 / ; 353 78 ;
Abstract
A film reader, including an irradiator for the film on which information is recorded, an optical system for projecting the information recorded on the film, an information storage body having an electrocromic substance, which changes color when a voltage is applied thereto, mounted between a pair of electrodes for recording and erasing information projected by the optical system, the whole area of the information storage body being irradiated with light.