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经营范围
发明名称
Directional aerial
摘要
申请公布号
US1947021(A)
申请公布日期
1934.02.13
申请号
US19290343710
申请日期
1929.03.01
申请人
RADIO CORPORATION
发明人
ROBERTS WALTER VAN B.
分类号
G01S3/06
主分类号
G01S3/06
代理机构
代理人
主权项
地址
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