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发明名称
TELEPHONE USE ACOUSTIC COUPLER
摘要
PURPOSE:To reduce the frequency deviation of full frequency band of the telephone service, through multiplier effect owing to the adoption of the circuit network which equalize or unequalize in the electric circuit.
申请公布号
JPS5228809(A)
申请公布日期
1977.03.04
申请号
JP19750104529
申请日期
1975.08.30
申请人
WATAMURA KOUICHI
发明人
TOMURA KOUICHI
分类号
H04M1/21;H04M1/215
主分类号
H04M1/21
代理机构
代理人
主权项
地址
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