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发明名称
Gerät und Verfahren zur Verarbeitung eines Fernsprechanrufs mit kostenloser Nummer
摘要
申请公布号
DE69029490(T2)
申请公布日期
1997.07.17
申请号
DE1990629490T
申请日期
1990.07.20
申请人
INTERNATIONAL BUSINESS MACHINES CORP., ARMONK, N.Y., US
发明人
JOLISSAINT, CHARLES H., DR., SUNNYVALE, CALIFORNIA 94087, US
分类号
H04M15/08;H04M3/51;H04M3/523;H04M7/06;H04M11/06;H04Q3/00;H04Q3/72;(IPC1-7):H04Q3/00;H04M3/50;H04M7/00
主分类号
H04M15/08
代理机构
代理人
主权项
地址
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