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发明名称
Schaltungsanordnung fuer Fernsprechanlagen, bei welchen waehrend enies Gespraechs Wechselstromstoesse simultan ueber die Anschlussleitung gegeben werden
摘要
申请公布号
DE891859(C)
申请公布日期
1953.10.01
申请号
DE1951S025970
申请日期
1951.11.21
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
LURK HANS-JOACHIM DIPL.-ING.
分类号
H04M15/28
主分类号
H04M15/28
代理机构
代理人
主权项
地址
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