CARD FOR TEACHING,申请号KR19900001793U-传众专利搜索

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发明名称	CARD FOR TEACHING
摘要
申请公布号	KR910008933(Y1)	申请公布日期	1991.11.15
申请号	KR19900001793U	申请日期	1990.02.19
申请人	SHIN SANG-KWON	发明人	SHIN SANG-KWON
分类号	G09B19/08;(IPC1-7):G09B19/08	主分类号	G09B19/08
代理机构		代理人
主权项
地址

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