PERCUSSIVE DRILLING SYSTEM,申请号USD3525408-传众专利搜索

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发明名称	PERCUSSIVE DRILLING SYSTEM
摘要
申请公布号	US3525408(A)	申请公布日期	1970.08.25
申请号	USD3525408	申请日期	1969.04.01
申请人	ESSO PRODUCTION RESEARCH CO.	发明人	WHITMAN D. MOUNCE
分类号	E21B4/06;E21B19/00;(IPC1-7):E21B1/06;E21B5/00	主分类号	E21B4/06
代理机构		代理人
主权项
地址

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