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发明名称
Computer network telephony
摘要
申请公布号
GB9907319(D0)
申请公布日期
1999.05.26
申请号
GB19990007319
申请日期
1999.03.31
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
分类号
H04M3/00;H04L12/66;H04M3/493;H04M7/00;H04M11/00
主分类号
H04M3/00
代理机构
代理人
主权项
地址
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