Appareil de calcul pour enseignement,申请号FRD1212623-传众专利搜索

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发明名称	Appareil de calcul pour enseignement
摘要
申请公布号	FR1212623(A)	申请公布日期	1960.03.24
申请号	FRD1212623	申请日期	1958.12.31
申请人		发明人	KNEFELI VITUS
分类号	G09B19/02	主分类号	G09B19/02
代理机构		代理人
主权项
地址

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