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发明名称
TELEPHONE CONFERENCING SYSTEMS
摘要
申请公布号
EP0913049(B1)
申请公布日期
2004.02.04
申请号
EP19970927279
申请日期
1997.06.20
申请人
INTELLPROP LIMITED
发明人
WILSON, JEFFREY
分类号
H04M3/56;H04M3/428;H04M3/487;H04M3/54;(IPC1-7):H04M3/56
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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