Eraser for blackboard,申请号GB20090010400-传众专利搜索

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发明名称	Eraser for blackboard
摘要
申请公布号	GB0910400(D0)	申请公布日期	2009.07.29
申请号	GB20090010400	申请日期	2009.06.17
申请人	YU, MING-FENG	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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