Lehrgeraet fuer die Volksschule, insbesondere fuer den Rechenunterricht,申请号DE1965K055047-传众专利搜索

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发明名称	Lehrgeraet fuer die Volksschule, insbesondere fuer den Rechenunterricht
摘要
申请公布号	DE1213647(B)	申请公布日期	1966.03.31
申请号	DE1965K055047	申请日期	1965.01.19
申请人	HEINRICH RUDOLF KLEIN	发明人	KLEIN HEINRICH RUDOLF
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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