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经营范围
发明名称
Anordnung zur Anschaltung von Fernsprechstationen, insbesondere von UEberwachungseinrichtungen, an mit Verstaerkern ausgeruestete Vierdrahtleitungen
摘要
申请公布号
DE857407(C)
申请公布日期
1952.11.27
申请号
DE1942S010485D
申请日期
1942.05.27
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
PFLEIDERER FRITZ DR.
分类号
H04M3/40
主分类号
H04M3/40
代理机构
代理人
主权项
地址
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