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经营范围
发明名称
Telephony system and method
摘要
申请公布号
GB9606910(D0)
申请公布日期
1996.06.05
申请号
GB19960006910
申请日期
1996.04.02
申请人
NORTHERN TELECOM LIMITED
发明人
分类号
H04M3/42;H04Q3/00
主分类号
H04M3/42
代理机构
代理人
主权项
地址
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