MULTIPLICATION STUDY DEVICE,申请号GB19790043227-传众专利搜索

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发明名称	MULTIPLICATION STUDY DEVICE
摘要
申请公布号	GB2038068(B)	申请公布日期	1983.01.19
申请号	GB19790043227	申请日期	1979.12.14
申请人	GAKKEN CO LTD	发明人
分类号	G09B3/02;G09B19/02;(IPC1-7):G09B3/02	主分类号	G09B3/02
代理机构		代理人
主权项
地址

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