Drill string protector and system,申请号US19650458821-传众专利搜索

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发明名称	Drill string protector and system
摘要
申请公布号	US3268275(A)	申请公布日期	1966.08.23
申请号	US19650458821	申请日期	1965.05.11
申请人	LAGHLIN WILLIAM N	发明人	LAGHLIN WILLIAM N.
分类号	E21B17/10;F16L15/06	主分类号	E21B17/10
代理机构		代理人
主权项
地址

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