METHOD AND SYSTEM FOR CALL HOLDING WITH CALL BACK
申请公布号:EP1287670(A1)
申请号:EP20010937897
申请日期:2001.05.31
申请公布日期:2003.03.05
发明人:KAMEL, MOATAZ;STRATTON, ROBERT P.
分类号:H04M3/42;H04M3/428;H04M3/48;(IPC1-7):H04M3/428
主分类号:H04M3/42
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