Jet perforating assembly for oil wells,申请号US19570684904-传众专利搜索

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发明名称	Jet perforating assembly for oil wells
摘要
申请公布号	US2960931(A)	申请公布日期	1960.11.22
申请号	US19570684904	申请日期	1957.09.19
申请人	E. I. DU PONT DE NEMOURS AND COMPANY	发明人	DOUGLASS JOHN J.
分类号	E21B43/118	主分类号	E21B43/118
代理机构		代理人
主权项
地址

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