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发明名称
RADIO AMPLIFYING DEVICE
摘要
申请公布号
CA384723(A)
申请公布日期
1939.10.17
申请号
CAD384723
申请日期
申请人
RADIO CORPORATION OF AMERICA
发明人
WILLIAM S. BARDEN
分类号
主分类号
代理机构
代理人
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地址
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