IMPROVEMENTS IN AND RELATING TO EDUCATIONAL DEVICES,申请号GB19700034382-传众专利搜索

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发明名称	IMPROVEMENTS IN AND RELATING TO EDUCATIONAL DEVICES
摘要
申请公布号	GB1278544(A)	申请公布日期	1972.06.21
申请号	GB19700034382	申请日期	1970.07.15
申请人	HARRY GRUBB	发明人	HARRY GRUBB
分类号	G09B23/10	主分类号	G09B23/10
代理机构		代理人
主权项
地址

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