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. 19, 1977
Filed:
Jan. 18, 1973
Applicant:
Inventors:
Karl Wagner, Ottobrunn, DT;
Bernhard VON Fischern, Munich, DT;
Assignee:
AGFA-Gevaert, A.G., Leverkusen, DT;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03B / ;
U.S. Cl.
CPC ...
354 / ; 354 53 ;
Abstract
Three electric lamps with different voltage-illumination thresholds are connected to be successively turned on to show exposure times by an electronic switch, such as a transistor, connected to a voltage divider composed of a photoconductor, exposed to scene light, and a resistor.
Wagner, Karl. (1977). Visual exposure indicator in photographic apparatus (U.S. Patent No. 4037232). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4037232
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile