Communication system

Details Communication system Communication system

2003-08-29

2010-06-08

Eng, George (Department: 2617)

Telecommunications

Radiotelephone system

Including private cordless extension system

C379S156000, C379S164000, C379S208010, C455S462000, C455S554100

Reexamination Certificate

active

07734301

ABSTRACT:
A communication system has a main device capable of communicating with a destination station through a line and at least one subsidiary device connectable to the main device. The main device includes an operating state signal transmitting system that transmits an operating state signal representing that the main device is currently performing a predetermined operation when the main device receives, from the subsidiary device, a communication request signal requesting a communication from the subsidiary device through the line, while the subsidiary device includes a first notifying system that notifies that the main device is performing the predetermined operation when the subsidiary device receives the operating state signal from the main device.

REFERENCES:
patent: 4430702 (1984-02-01), Schiebe et al.
patent: 4723264 (1988-02-01), Sasuta et al.
patent: 4776001 (1988-10-01), Murata et al.
patent: 4821310 (1989-04-01), Lynk et al.
patent: 5022068 (1991-06-01), Fujisaki et al.
patent: 5280630 (1994-01-01), Wang
patent: 5530951 (1996-06-01), Argintar
patent: 5570411 (1996-10-01), Sicher
patent: 5592534 (1997-01-01), Ito
patent: 5644621 (1997-07-01), Yamashita et al.
patent: 5966665 (1999-10-01), Taki
patent: 5991386 (1999-11-01), Nurmi
patent: 6160872 (2000-12-01), Karnowski et al.
patent: 6212221 (2001-04-01), Wakayama et al.
patent: 6393275 (2002-05-01), Alfred
patent: 6725457 (2004-04-01), Priem et al.
patent: 6781979 (2004-08-01), Ebata et al.
patent: 6788953 (2004-09-01), Cheah et al.
patent: 6952588 (2005-10-01), Igarashi
patent: 7046961 (2006-05-01), Park
patent: 2002/0101970 (2002-08-01), Contractor
patent: 2003/0013440 (2003-01-01), Takatori et al.
patent: A 2-217030 (1990-08-01), None
patent: A 5-95389 (1993-04-01), None
patent: A 2000-151787 (2000-05-01), None
U.S. National Stage Worksheet for U.S. Appl. No. 10/204,556 (US-2003/013440) Takatori et al. showing 35 USC 371 requirements met on Aug. 22, 2002.

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