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发明名称
Multi-party communication
摘要
申请公布号
GB2312810(B)
申请公布日期
2000.02.16
申请号
GB19970008255
申请日期
1997.04.24
申请人
* GPT LIMITED;* SIEMENS GEC COMMUNICATION SYSTEMS LIMITED;* SIEMENS PLC
发明人
JOHN ROBERT * ELWELL;KEITH EDMUND * DRAGE
分类号
H04L12/18;H04M3/56;H04N7/15;(IPC1-7):H04N7/15
主分类号
H04L12/18
代理机构
代理人
主权项
地址
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