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:
Jun. 07, 1988
Filed:
Nov. 19, 1985
Applicant:
Inventors:
David A Zeller, Jr, Brookfield, CT (US);
Francisco A Middleton, Newtown, CT (US);
Franklin Hargrave, Newtown, CT (US);
Assignee:
Alcatel USA Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ;
U.S. Cl.
CPC ...
370 76 ; 375 36 ; 379327 ;
Abstract
A line access apparatus for in-band communication includes a line coupler that functions as a high voltage isolation device and has a resonant frequency out of the signal transmission band. A carrier signal of about the resonant frequency is modulated at an in-band frequency to convey information across the line coupler.