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发明名称
Schaltungsanordnung fuer Fernsprechanlagen mit Vierdraht- und Zweidrahtleitungen
摘要
申请公布号
DE923203(C)
申请公布日期
1955.02.07
申请号
DE1951S025174
申请日期
1951.10.14
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
WESTPHAL HERBERT
分类号
H04Q3/00
主分类号
H04Q3/00
代理机构
代理人
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地址
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