Rechenlehrmittel,申请号DE1929E039386D-传众专利搜索

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发明名称	Rechenlehrmittel
摘要
申请公布号	DE583152(C)	申请公布日期	1933.11.21
申请号	DE1929E039386D	申请日期	1929.06.15
申请人	HEDWIG EISEMANN GEB. LOEBENSTEIN;ELSE DE GROOT GEB. EISEMANN;JOSEPH EISEMANN;ERICH EISEMANN	发明人
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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