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经营范围
发明名称
CONCENTRIC LINE TUNED CIRCUIT
摘要
申请公布号
CA401671(A)
申请公布日期
1941.12.23
申请号
CAD401671
申请日期
申请人
RADIO CORPORATION OF AMERICA
发明人
JAMES W. CONKLIN
分类号
主分类号
代理机构
代理人
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