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:
Aug. 03, 1976
Filed:
Feb. 11, 1975
Petrie Johan van der Plaats, Hilversum, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
An electronic telephone subscriber set which is suitable for co-operation with a telephone exchange incorporating supply resistors, the values of which are substantially higher during the detection of the closed/non-closed conditions of a subscriber loop than during the speech condition and which is provided with an adjustable direct current resistor connected across the line connection terminals and a current detector coupled thereto for adjusting the direct current resistor to one of two values in dependence of the line current in order to enable optimum detection of the closed/non-closed conditions of the subscriber loop.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile