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:
Sep. 01, 1992
Filed:
Dec. 03, 1990
Applicant:
Inventor:
Masao Kiguchi, Yokohama, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379 93 ; 379100 ; 358438 ; 358443 ;
Abstract
A communication apparatus comprises a switch to selectively connect a line to a speech communication path or a data communication path, signal receiving circuits connected to those two communication paths, a signal detection circuit for detecting a predetermined signal from an output of the signal receiving circuit, and a control circuit for modifying a detection criterion of the signal detection circuit in accordance with a line connection status of the switch.