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经营范围
发明名称
Identification system for telephone or like exchanges
摘要
申请公布号
GB1141140(A)
申请公布日期
1969.01.29
申请号
GB19670057894
申请日期
1967.12.20
申请人
INTERNATIONAL STANDARD ELECTRIC CORPORATION
发明人
分类号
H04Q3/54
主分类号
H04Q3/54
代理机构
代理人
主权项
地址
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