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发明名称
Schaltungsanordnung fuer Fernsprechanlagen mit Umschaltung bestehender Verbindungen auf in Rueckfrage angerufene Anschlussstellen
摘要
申请公布号
DE862027(C)
申请公布日期
1953.01.08
申请号
DE1939S005348D
申请日期
1939.01.27
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
PFAFF WALTER DIPL.-ING.
分类号
H04M3/58
主分类号
H04M3/58
代理机构
代理人
主权项
地址
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