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. 03, 1987
Filed:
Jul. 23, 1985
Walter Bletz, Braunfels, DE;
Rolf Magel, Fernwald, DE;
Ernst Leitz Wetzlar GmbH, Wetzlar, DE;
Abstract
In a switching circuit for an electronic exposure meter in optical devices with a photoelectric converter at the input of an amplifier which logarithmizes the output current from said converter, with a temperature compensation circuit and a photoelectric current limit value circuit and with an indicator, a voltage supply source having a main switch, means are provided on the device for coupling to the main switch. These means effect automatic connection or disconnection of the switching circuit to or from the supply source.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile