Rotary reciprocating well drill,申请号US19350001220-传众专利搜索

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发明名称	Rotary reciprocating well drill
摘要
申请公布号	US2085279(A)	申请公布日期	1937.06.29
申请号	US19350001220	申请日期	1935.01.10
申请人	TAUTENHAHN OTTO R	发明人	TAUTENHAHN OTTO R.
分类号	E21B4/06;E21B6/00	主分类号	E21B4/06
代理机构		代理人
主权项
地址

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