Control method and appartus for a radio telephone system

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United States of America Patent

PATENT NO 4897864
SERIAL NO

07178844

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A method and apparatus for controlling a radio telephone system wherein a speech channel is established between one radio telephone handset out of a plurality of radio telephone handsets and a base unit. An interphone switch for selecting intercom communication is provided for respective radio telephone handsets. The transmitters of the radio telephone handsets are turned OFF when the intercom switch is OFF, and transmitters of the radio telephone handsets are turned ON when the intercom switch is ON. Consequently the connection between a wired telephone channel and the plurality of radio telephone handsets can be controlled with a single base unit connected to the wired telephone channel.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
NIPPON TELEGRAPH AND TELEPHONE CORPTOKYO TOKYO METROPOLIS

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ito, Koichi Hino, JP 310 4641
Murata, Yoshitoshi Yokosuka, JP 10 437
Yoshizawa, Kazuhiro Kashiwa, JP 20 447
Yotsutani, Akio Tokyo, JP 17 592

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