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发明名称
Verfahren und Apparat zum Ausweiten einer Datenrate in einem ISDN-Kommunikationssystem
摘要
申请公布号
DE19859909(B4)
申请公布日期
2008.06.26
申请号
DE19981059909
申请日期
1998.12.23
申请人
RICOH CO. LTD.
发明人
MALIK, NAEEM IQBAL
分类号
H04M11/00;H04N1/32;H04L29/08;H04M11/06;H04Q11/04
主分类号
H04M11/00
代理机构
代理人
主权项
地址
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