Seal protection for rock bits,申请号GB19940020987-传众专利搜索

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发明名称	Seal protection for rock bits
摘要
申请公布号	GB2283037(A)	申请公布日期	1995.04.26
申请号	GB19940020987	申请日期	1994.10.18
申请人	* SMITH INTERNATIONAL INC	发明人	QUAN VAN * NGUYEN
分类号	E21B10/22;E21B10/25;(IPC1-7):E21B10/22	主分类号	E21B10/22
代理机构		代理人
主权项
地址

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