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发明名称
Verfahren zur Geheimuebermittlung, insbesondere zur Geheimtelefonie
摘要
申请公布号
DE524813(C)
申请公布日期
1931.05.13
申请号
DED524813D
申请日期
1930.03.14
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
BOEHM DR. OTTO
分类号
H04K1/00
主分类号
H04K1/00
代理机构
代理人
主权项
地址
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