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经营范围
发明名称
Frequency discriminator
摘要
申请公布号
US2520621(A)
申请公布日期
1950.08.29
申请号
US19490096353
申请日期
1949.05.31
申请人
RADIO CORPORATION OF AMERICA
发明人
JR. ROY A. BEERS,
分类号
H03D3/08
主分类号
H03D3/08
代理机构
代理人
主权项
地址
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