Portable drilling rig,申请号US19550540821-传众专利搜索

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发明名称	Portable drilling rig
摘要
申请公布号	US2848196(A)	申请公布日期	1958.08.19
申请号	US19550540821	申请日期	1955.10.17
申请人	JOHN H. LUCAS	发明人	SIMMONDS WAYNE W.
分类号	E21B15/00;E21B19/14	主分类号	E21B15/00
代理机构		代理人
主权项
地址

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