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发明名称
TWO-WIRE AUDIO TELECONFERENCE DEVICE
摘要
申请公布号
JPH09289475(A)
申请公布日期
1997.11.04
申请号
JP19960101762
申请日期
1996.04.24
申请人
NEC CORP
发明人
HASEGAWA ATSUSHI
分类号
H04M3/56;H04B3/23;H04M1/60;H04M9/08;(IPC1-7):H04B3/23
主分类号
H04M3/56
代理机构
代理人
主权项
地址
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