BLACKBOARD AUTO ERASER,申请号KR19900020088U-传众专利搜索

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发明名称	BLACKBOARD AUTO ERASER
摘要
申请公布号	KR930001724(Y1)	申请公布日期	1993.04.12
申请号	KR19900020088U	申请日期	1990.12.17
申请人	QNIX COMPUTER CO., LTD.	发明人	PARK, KWANG - HO
分类号	B43L21/04;(IPC1-7):B43L21/04	主分类号	B43L21/04
代理机构		代理人
主权项
地址

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