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发明名称
Schaltungsanordnung fuer Fernsprechanlagen, in denen Zwei- und Vierdrahtleitungen ueber Endverstaerker miteinander verbunden werden
摘要
申请公布号
DE715995(C)
申请公布日期
1942.01.10
申请号
DE1935S118679D
申请日期
1935.06.16
申请人
SIEMENS & HALSKE AG.
发明人
PFLEIDERER DIPL.-ING. FRITZ
分类号
H04B1/58
主分类号
H04B1/58
代理机构
代理人
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