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发明名称
SYSTEM FOR BIDIRECTIONAL MOBILE EDUCATION AND METHOD THEREOF
摘要
申请公布号
KR20090043848(A)
申请公布日期
2009.05.07
申请号
KR20070109632
申请日期
2007.10.30
申请人
SK TELECOM CO., LTD.
发明人
JEE, CHANG WOO;KIM, PIL SEONG;SEO, TAE SAM;KIM, MIN SEOK
分类号
H04W8/24;H04W4/00
主分类号
H04W8/24
代理机构
代理人
主权项
地址
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