Concentration of ores,申请号US19290394740-传众专利搜索

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发明名称	Concentration of ores
摘要
申请公布号	US1797356(A)	申请公布日期	1931.03.24
申请号	US19290394740	申请日期	1929.09.23
申请人	MARTIN RHETHERFORD B	发明人	MARTIN RHETHERFORD B.
分类号	B03D1/02	主分类号	B03D1/02
代理机构		代理人
主权项
地址

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