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发明名称
Direct current amplifier
摘要
申请公布号
US2179265(A)
申请公布日期
1939.11.07
申请号
US19370159025
申请日期
1937.08.14
申请人
RADIO CORPORATION OF AMERICA
发明人
LUCK DAVID G. C.
分类号
H03F3/40
主分类号
H03F3/40
代理机构
代理人
主权项
地址
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