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经营范围
发明名称
Propagation of radio waves through a tunnel
摘要
申请公布号
US2478133(A)
申请公布日期
1949.08.02
申请号
US19460687479
申请日期
1946.07.31
申请人
SHANKLIN JOHN P
发明人
SHANKLIN JOHN P.
分类号
H01P3/08;H01Q1/32;H01Q1/46;H04B5/00
主分类号
H01P3/08
代理机构
代理人
主权项
地址
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