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经营范围
发明名称
Directional radio beam system
摘要
申请公布号
US1944563(A)
申请公布日期
1934.01.23
申请号
US19310553777
申请日期
1931.07.29
申请人
FEDERAL TELEGRAPH COMPANY
发明人
KRUESI GEOFFREY G.
分类号
H01Q19/12
主分类号
H01Q19/12
代理机构
代理人
主权项
地址
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