Direct call service system using VoIP,申请号KR20050016888U-传众专利搜索

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发明名称	Direct call service system using VoIP
摘要
申请公布号	KR200395461(Y1)	申请公布日期	2005.09.14
申请号	KR20050016888U	申请日期	2005.06.13
申请人		发明人
分类号	H04L12/66;H04L12/28;H04M3/42;(IPC1-7):H04L12/66;H04Q7/20	主分类号	H04L12/66
代理机构		代理人
主权项
地址

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