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发明名称
Telephone party line switching
摘要
申请公布号
US3004107(A)
申请公布日期
1961.10.10
申请号
US19560574360
申请日期
1956.03.27
申请人
SIEMENS & HALSKE AKTIENGESELLSCHAFT
发明人
GROTE RICHARD;JAUCH EUGEN;TOPFER HERBERT;VOITHENLEITNER WALTER
分类号
H04Q3/58
主分类号
H04Q3/58
代理机构
代理人
主权项
地址
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