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发明名称
Maintenance termination unit for ISDN
摘要
申请公布号
EP0539028(B1)
申请公布日期
1998.08.05
申请号
EP19920308693
申请日期
1992.09.24
申请人
AT&T CORP.
发明人
DEBALKO, GEORGE ANDREW
分类号
H04M3/06;H04M3/24;H04M3/30;H04Q11/04;(IPC1-7):H04M3/22
主分类号
H04M3/06
代理机构
代理人
主权项
地址
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