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发明名称
Streckenfernsprecheinrichtung zum Betrieb ueber Vierdrahtverbindungen mit Verstaerkern
摘要
申请公布号
DE725337(C)
申请公布日期
1942.09.19
申请号
DE1940M149517D
申请日期
1940.12.24
申请人
MIX & GENEST AG.
发明人
OSWALD DIPL.-ING. FELIX
分类号
H04M3/40
主分类号
H04M3/40
代理机构
代理人
主权项
地址
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