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:
Jan. 18, 1977
Filed:
Apr. 29, 1975
Applicant:
Inventors:
Jean Picandet, Paris, FR;
Francois Boullier, Saint-Ouen, FR;
Assignee:
Jeumont-Schneider, Puteaux, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
179 70 ; 179 / ;
Abstract
A d.c. power supply circuit for a telephone line which utilizes transistor circuits having an active reactance to replace the telephone transformer. The transistor circuits each transform a capacitor into an effectively inductive reactance, thus resulting in a cost and space savings.