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发明名称
Apparatus for the directional transmission and reception of wave energy
摘要
申请公布号
US1969005(A)
申请公布日期
1934.08.07
申请号
US19300446873
申请日期
1930.04.24
申请人
ELECTROACUSTIC GESELLSCHAFT MIT BESCHRANKTE HAFTUNG
发明人
HECHT HEINRICH
分类号
H01Q21/00
主分类号
H01Q21/00
代理机构
代理人
主权项
地址
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