Tongs for coupling and uncoupling drill pipe joints,申请号US19520291156-传众专利搜索

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发明名称	Tongs for coupling and uncoupling drill pipe joints
摘要
申请公布号	US2737839(A)	申请公布日期	1956.03.13
申请号	US19520291156	申请日期	1952.06.02
申请人	JOY MANUFACTURING COMPANY	发明人	PAGET WIN W.
分类号	E21B19/16	主分类号	E21B19/16
代理机构		代理人
主权项
地址

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