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发明名称
METHOD FOR SERVICING RING BACK TONE
摘要
申请公布号
KR20070021514(A)
申请公布日期
2007.02.23
申请号
KR20050075811
申请日期
2005.08.18
申请人
发明人
分类号
H04Q7/24
主分类号
H04Q7/24
代理机构
代理人
主权项
地址
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