ABACUS CALCULATION AND MENTAL ARITHMETIC ASSESSMENT SYSTEM AND ASSESSMENT METHOD USING A BEADS' MOVEMENT,申请号KR20080053300-传众专利搜索

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发明名称	ABACUS CALCULATION AND MENTAL ARITHMETIC ASSESSMENT SYSTEM AND ASSESSMENT METHOD USING A BEADS' MOVEMENT
摘要
申请公布号	KR101006263(B1)	申请公布日期	2011.01.06
申请号	KR20080053300	申请日期	2008.06.05
申请人		发明人
分类号	G06Q50/20;G06C1/00	主分类号	G06Q50/20
代理机构		代理人
主权项
地址

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