Cutter for well drills,申请号GB19570029434-传众专利搜索

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发明名称	Cutter for well drills
摘要
申请公布号	GB814869(A)	申请公布日期	1959.06.10
申请号	GB19570029434	申请日期	1957.09.18
申请人	HUGHES TOOL COMPANY	发明人
分类号	E21B10/50	主分类号	E21B10/50
代理机构		代理人
主权项
地址

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