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. 26, 1986
Filed:
Jan. 21, 1983
Applicant:
Inventors:
Aloysius J Nijman, Eindhoven, NL;
Franciscus A Schoofs, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
179 / ; 179 70 ;
Abstract
A subscriber circuit for a telephone network which is coupled to earth via a frequency-dependent coupling circuit. As for direct current the coupling circuit has a much lower impedance than for alternating current, the electrolytic corrosion due to leakage current in the subscriber line is counteracted and no severe requirements need to be imposed on the equality of the impedances in the two wires of the subscriber line.
Nijman, Aloysius. (1986). Subscriber circuit for a telephone network (U.S. Patent No. 4608461). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4608461
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile