PROCEDIMENTO PER LA FABBRICAZIONE DELLE TRIVELLE DA ROCCIA,申请号IT19790068965-传众专利搜索

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发明名称	PROCEDIMENTO PER LA FABBRICAZIONE DELLE TRIVELLE DA ROCCIA
摘要
申请公布号	IT1119375(B)	申请公布日期	1986.03.10
申请号	IT19790068965	申请日期	1979.10.09
申请人	SMITH INTERNATIONAL IN.	发明人	ROBERT DONALD THOMAS
分类号	E21C;(IPC1-7):E21C/	主分类号	E21C
代理机构		代理人
主权项
地址

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