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发明名称
Apparatus and its method for providing additional information using bi-directional broadcasting service
摘要
申请公布号
KR20070035327(A)
申请公布日期
2007.03.30
申请号
KR20050090045
申请日期
2005.09.27
申请人
发明人
分类号
H04N7/173;H04N5/445
主分类号
H04N7/173
代理机构
代理人
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