O-ring seal for rock bit bearings,申请号SG19950000084-传众专利搜索

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发明名称	O-ring seal for rock bit bearings
摘要
申请公布号	SG22889(A1)	申请公布日期	1995.11.28
申请号	SG19950000084	申请日期	1995.03.10
申请人	SMITH INTERNATIONAL, INC	发明人	QUANTZ, WAYNE C.;KESHAVAN, MADAPUSI K.;HOOPER MICHAEL E.;HOMMEL, MARK J.
分类号	E21B10/24;(IPC1-7):E21B10/24	主分类号	E21B10/24
代理机构		代理人
主权项
地址

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