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:
May. 12, 1992
Filed:
Dec. 06, 1990
Applicant:
Inventor:
Naoto Kagami, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04J / ; H04M / ;
U.S. Cl.
CPC ...
3701102 ; 3701101 ; 379 93 ; 379100 ; 358442 ;
Abstract
A line interface for ISDN channels converts an analog signed from an analog communication terminal to digital data and sends the converted digital data to a B-channel of ISDN. The digital data from the B-channel of ISDN is converted to an analog signal and the converted analog signal is then sent to the analog communication terminal.