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发明名称
Variable gain signal amplifying system
摘要
申请公布号
US2160097(A)
申请公布日期
1939.05.30
申请号
US19370140060
申请日期
1937.04.30
申请人
RADIO CORPORATION OF AMERICA
发明人
WEATHERS PAUL
分类号
H03G7/02
主分类号
H03G7/02
代理机构
代理人
主权项
地址
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