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发明名称
Schaltungsanordnung fuer Fernsprechnebenstellenanlagen mit Rueckfrageumschaltungen und Signalgabe zur Nebenstellenbeamtin
摘要
申请公布号
DE973649(C)
申请公布日期
1960.04.21
申请号
DE1955S043234
申请日期
1955.03.30
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
GROHMANN WALTER
分类号
H04M3/58;H04Q3/62
主分类号
H04M3/58
代理机构
代理人
主权项
地址
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