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经营范围
发明名称
Electrical filters
摘要
申请公布号
US2729698(A)
申请公布日期
1956.01.03
申请号
US19540457687
申请日期
1954.09.22
申请人
RADIO CORPORATION OF AMERICA
发明人
FREDENDALL GORDON L.
分类号
H03H7/01;H04N9/78
主分类号
H03H7/01
代理机构
代理人
主权项
地址
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