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发明名称
Electrostatic microphone circuits
摘要
申请公布号
US2920140(A)
申请公布日期
1960.01.05
申请号
US19580721539
申请日期
1958.03.14
申请人
RADIO CORPORATION OF AMERICA
发明人
MORGAN ADOLPH R.
分类号
H04R19/04
主分类号
H04R19/04
代理机构
代理人
主权项
地址
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