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经营范围
发明名称
TELECOMMUNICATIONS EXCHANGE SYSTEMS
摘要
申请公布号
GB1463364(A)
申请公布日期
1977.02.02
申请号
GB19740008768
申请日期
1974.02.27
申请人
SIEMENS AG
发明人
分类号
H04Q3/54;(IPC1-7):H04Q3/42
主分类号
H04Q3/54
代理机构
代理人
主权项
地址
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