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:
Apr. 22, 1986
Filed:
Oct. 26, 1983
Applicant:
Inventors:
Alain Forestier, Ploubezre, FR;
Philippe Fenaux, Sceaux, FR;
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H04Q / ; H04M / ; H04M / ;
U.S. Cl.
CPC ...
34082538 ; 179 / ; 179 / ;
Abstract
D.C.-fed ringing signal generator for a group of subscriber lines comprises a cascade arrangement of a digital signal generator controllable by a control signal to produce a signal corresponding either to the ringing signal or to a signal having zero value,