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发明名称
ECHOKOMPENSATORSYSTEM
摘要
申请公布号
DE69730428(D1)
申请公布日期
2004.09.30
申请号
DE19976030428
申请日期
1997.06.30
申请人
MCI COMMUNICATIONS CORP., WASHINGTON
发明人
LITZENBERGER, D.;FEE, A.;BORN, W.;EASTEP, MICHAEL
分类号
H04B10/00;H04B3/23;H04B10/22;H04M1/00;H04M3/00;H04Q3/42;H04Q11/04;(IPC1-7):H04M9/08
主分类号
H04B10/00
代理机构
代理人
主权项
地址
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