Directional window cutter for whipstocks,申请号US19530373116-传众专利搜索

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发明名称	Directional window cutter for whipstocks
摘要
申请公布号	US2807440(A)	申请公布日期	1957.09.24
申请号	US19530373116	申请日期	1953.08.10
申请人	J. E. HILL	发明人	BECK JULIUS S.
分类号	E21B7/06;E21B29/06	主分类号	E21B7/06
代理机构		代理人
主权项
地址

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