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发明名称
Volume control circuits
摘要
申请公布号
US2214613(A)
申请公布日期
1940.09.10
申请号
US19390263602
申请日期
1939.03.23
申请人
RADIO CORPORATION OF AMERICA
发明人
HEROLD EDWARD W.
分类号
H03G3/00;H03G3/22
主分类号
H03G3/00
代理机构
代理人
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地址
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