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发明名称
Amplifier
摘要
申请公布号
US2175838(A)
申请公布日期
1939.10.10
申请号
US19310540311
申请日期
1931.05.27
申请人
RADIO CORPORATION OF AMERICA
发明人
HANSELL CLARENCE W.
分类号
H03F1/33
主分类号
H03F1/33
代理机构
代理人
主权项
地址
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