PROTECTOR FOR ROCK BIT SEALS,申请号EP20070838548-传众专利搜索

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发明名称	PROTECTOR FOR ROCK BIT SEALS
摘要
申请公布号	EP2082113(B1)	申请公布日期	2012.09.19
申请号	EP20070838548	申请日期	2007.09.20
申请人	BAKER HUGHES INCORPORATED	发明人	LIN, CHIH, C.
分类号	E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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