Stop devices for well conduits,申请号US19580728410-传众专利搜索

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发明名称	Stop devices for well conduits
摘要
申请公布号	US2986417(A)	申请公布日期	1961.05.30
申请号	US19580728410	申请日期	1958.04.14
申请人	BAKER OIL TOOLS, INC.	发明人	BAKER JOHN R.
分类号	E21B17/10	主分类号	E21B17/10
代理机构		代理人
主权项
地址

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