Dispositif pour améliorer la concentration ou la coïncidence lors de l'étude d'inscriptions à enregistrement visuel,申请号FR19620903222-传众专利搜索

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发明名称	Dispositif pour améliorer la concentration ou la coïncidence lors de l'étude d'inscriptions à enregistrement visuel
摘要
申请公布号	FR1334564(A)	申请公布日期	1963.08.09
申请号	FR19620903222	申请日期	1962.07.06
申请人		发明人	RITTER EDUARD
分类号	G09B5/06	主分类号	G09B5/06
代理机构		代理人
主权项
地址

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