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发明名称
Schaltungsanordnung fuer Fernsprechanlagen mit Anrufspeicherung und selbsttaetigem Rueckruf
摘要
申请公布号
DE664177(C)
申请公布日期
1938.08.22
申请号
DE1934S114122D
申请日期
1934.05.29
申请人
SIEMENS & HALSKE AKT.-GES.
发明人
分类号
H04M3/523
主分类号
H04M3/523
代理机构
代理人
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