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发明名称
Verfahren zur geheimen UEbermittlung í¬ insbesondere von Telephoniestroemen í¬ mittels modulierter Hochfrequenz
摘要
申请公布号
DE521991(C)
申请公布日期
1931.03.28
申请号
DE1928T035579D
申请日期
1928.08.17
申请人
TELEFUNKEN GESELLSCHAFT FUER DRAHTLOSE TELEGRAPHIE M.B.H.
发明人
ROOSENSTEIN DR. HANS
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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