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发明名称
An isdn communication system
摘要
申请公布号
GB9719301(D0)
申请公布日期
1997.11.12
申请号
GB19970019301
申请日期
1997.09.11
申请人
OPTIMA TELECOMMUNICATIONS LTD
发明人
分类号
H04Q11/04
主分类号
H04Q11/04
代理机构
代理人
主权项
地址
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