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发明名称
Perfectionnements aux antennes pour ondes électro-magnétiques
摘要
申请公布号
FR692556(A)
申请公布日期
1930.11.07
申请号
FRD692556
申请日期
1930.03.22
申请人
TELEFUNKEN GESELLSCHAFT FUR DRAHTLOSE TELEGRAPHIE M. B. H.
发明人
分类号
H01Q21/20
主分类号
H01Q21/20
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代理人
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地址
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