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发明名称
Directional antenna
摘要
申请公布号
US2640931(A)
申请公布日期
1953.06.02
申请号
US19500160349
申请日期
1950.05.05
申请人
ROOT JOHN J
发明人
ROOT JOHN J.
分类号
H01Q3/32
主分类号
H01Q3/32
代理机构
代理人
主权项
地址
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