BRAKING DEVICES AND METHODS FOR USE IN DRILLING OPERATIONS,申请号EP20090735209-传众专利搜索

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发明名称	BRAKING DEVICES AND METHODS FOR USE IN DRILLING OPERATIONS
摘要
申请公布号	EP2271818(A4)	申请公布日期	2011.09.14
申请号	EP20090735209	申请日期	2009.04.22
申请人	LONGYEAR TM, INC.	发明人	DRENTH, CHRISTOPHER, L.
分类号	E21B23/01;E21B25/02	主分类号	E21B23/01
代理机构		代理人
主权项
地址

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