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发明名称
Electrical wave filter
摘要
申请公布号
US2220922(A)
申请公布日期
1940.11.12
申请号
US19380196362
申请日期
1938.03.17
申请人
RADIO CORPORATION OF AMERICA
发明人
TREVOR BERTRAM
分类号
H01P1/205
主分类号
H01P1/205
代理机构
代理人
主权项
地址
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