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发明名称
RELAYING SYSTEM WITH A CONFERENCE DEVICE
摘要
申请公布号
EP0459563(A3)
申请公布日期
1993.06.16
申请号
EP19910201219
申请日期
1991.05.22
申请人
PHILIPS PATENTVERWALTUNG GMBH;N.V. PHILIPS' GLOEILAMPENFABRIEKEN
发明人
HOFMANN, RUDOLF, DIPL.-ING.
分类号
H04M3/56;(IPC1-7):H04M3/56;H04Q11/04
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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