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发明名称
Schaltungsanordnung zur Steuerung des UEbertragungsmasses fuer Gegensprechanlagen bzw. fuer Verstaerker in Fernsprechleitungen
摘要
申请公布号
DE519738(C)
申请公布日期
1931.03.04
申请号
DE1926H123260D
申请日期
1926.05.27
申请人
DIPL.-ING. WILHELM HAHN;DIPL.-ING. HANS WARNCKE
发明人
分类号
H04B3/20
主分类号
H04B3/20
代理机构
代理人
主权项
地址
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