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发明名称
THE GLOBE HAVING ABILITY OF A BLACKBOARD
摘要
申请公布号
KR200165594(Y1)
申请公布日期
2000.02.15
申请号
KR19990015250U
申请日期
1999.07.28
申请人
IM, SANG - RAE
发明人
IM, SANG - RAE
分类号
G09B27/02;(IPC1-7):G09B27/02
主分类号
G09B27/02
代理机构
代理人
主权项
地址
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