IMPROVEMENTS TO DOWNHOLE HAMMERS,申请号AU19890040262-传众专利搜索

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发明名称	IMPROVEMENTS TO DOWNHOLE HAMMERS
摘要
申请公布号	AU616552(B2)	申请公布日期	1991.10.31
申请号	AU19890040262	申请日期	1989.08.24
申请人	IAN GRAEME REAR	发明人	IAN GRAEME REAR
分类号	E21B4/14;E21B21/10;E21B31/03;(IPC1-7):E21B4/14	主分类号	E21B4/14
代理机构		代理人
主权项
地址

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