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经营范围
发明名称
CIRCUIT FOR MODULATOR AND DEMODULATOR
摘要
PURPOSE:To enable the data transmission by a high speed sound coupling, with an optimum equalization for the performance of the carbon transmitter used, by utilizing the side tone specific to a telephone circuit.
申请公布号
JPS5362401(A)
申请公布日期
1978.06.03
申请号
JP19760138193
申请日期
1976.11.16
申请人
NIPPON ELECTRIC CO
发明人
WATANABE ISAO
分类号
H04M11/06;H04L27/10;H04M11/00
主分类号
H04M11/06
代理机构
代理人
主权项
地址
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