Method of making abrasive material,申请号US19430507737-传众专利搜索

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发明名称	Method of making abrasive material
摘要
申请公布号	US2383988(A)	申请公布日期	1945.09.04
申请号	US19430507737	申请日期	1943.10.26
申请人	PERRY FRANK R	发明人	PERRY FRANK R.
分类号	B24C11/00	主分类号	B24C11/00
代理机构		代理人
主权项
地址

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