Threaded pipe joint having improved seal ring entrapment,申请号US19890320476-传众专利搜索

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发明名称	Threaded pipe joint having improved seal ring entrapment
摘要
申请公布号	US4944538(A)	申请公布日期	1990.07.31
申请号	US19890320476	申请日期	1989.03.08
申请人	BAROID TECHNOLOGY, INC.	发明人	READ, SHANNON R.
分类号	E21B17/042;F16L15/04;F16L15/06	主分类号	E21B17/042
代理机构		代理人
主权项
地址

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