Synchronous chatter percussion hammer drill,申请号US19630310622-传众专利搜索

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发明名称	Synchronous chatter percussion hammer drill
摘要
申请公布号	US3303899(A)	申请公布日期	1967.02.14
申请号	US19630310622	申请日期	1963.09.23
申请人	TRIDENT INDUSTRIES, INC.	发明人	JR. GROVER STEPHEN JONES,;BARDWELL ALLEN E.
分类号	E21B4/06	主分类号	E21B4/06
代理机构		代理人
主权项
地址

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