Drill pipe slip,申请号US19290412520-传众专利搜索

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发明名称	Drill pipe slip
摘要
申请公布号	US1834316(A)	申请公布日期	1931.12.01
申请号	US19290412520	申请日期	1929.12.07
申请人	ABEGG & REINHOLD COMPANY	发明人	MCLAGAN GEORGE E.
分类号	E21B19/10	主分类号	E21B19/10
代理机构		代理人
主权项
地址

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