Lehr- und Anschauungsmittel zum Erlernen des Rechnens,申请号DE1951G007150-传众专利搜索

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发明名称	Lehr- und Anschauungsmittel zum Erlernen des Rechnens
摘要
申请公布号	DE895987(C)	申请公布日期	1953.11.09
申请号	DE1951G007150	申请日期	1951.03.04
申请人	GUDLADT ERWIN	发明人	GUDLADT ERWIN
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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