Slip joint for drill stems,申请号US19290345683-传众专利搜索

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发明名称	Slip joint for drill stems
摘要
申请公布号	US1844257(A)	申请公布日期	1932.02.09
申请号	US19290345683	申请日期	1929.03.09
申请人	LINCOLN ROBERT A	发明人	LINCOLN ROBERT A.
分类号	E21B17/07	主分类号	E21B17/07
代理机构		代理人
主权项
地址

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