Method of grinding and polishing gem facets,申请号US19440528884-传众专利搜索

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发明名称	Method of grinding and polishing gem facets
摘要
申请公布号	US2429961(A)	申请公布日期	1947.10.28
申请号	US19440528884	申请日期	1944.03.31
申请人	JOSEPH ALSTER	发明人	RAKOWITZKY GREGOR H.
分类号	B24B9/16	主分类号	B24B9/16
代理机构		代理人
主权项
地址

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