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:
Dec. 10, 1996
Filed:
Jan. 05, 1995
Applicant:
Inventors:
Yukihiko Ogata, Kawasaki, JP;
Takuji Nakatsuma, Machida, JP;
Assignee:
Canon Kabushiki Kaisha, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H04M / ;
U.S. Cl.
CPC ...
379374 ; 379376 ; 379210 ; 379214 ; 370524 ;
Abstract
In a communication system having a plurality of communication apparatuses that are connected to one line, each communication apparatus has a detection circuit for detecting a call signal from the line to another communication apparatus connected to the line. Each communication apparatus also has a circuit that informs the operator at the communication apparatus of such call signal or a device for altering such call signal to a call signal to the communication apparatus itself.