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发明名称
Wechselsprechgeraet mit einer Dreielektrodenroehre
摘要
申请公布号
DE721235(C)
申请公布日期
1942.05.30
申请号
DE1939ST58858D
申请日期
1939.06.30
申请人
STASSFURTER RUNDFUNK-GESELLSCHAFT M.B.H.;DR. HANS FUHRMANN
发明人
FUHRMANN DR. HANS
分类号
H04B1/54
主分类号
H04B1/54
代理机构
代理人
主权项
地址
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