Core catcher for well drills,申请号US19290374849-传众专利搜索

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发明名称	Core catcher for well drills
摘要
申请公布号	US1808009(A)	申请公布日期	1931.06.02
申请号	US19290374849	申请日期	1929.06.29
申请人	HUGHES TOOL COMPANY	发明人	SCOTT FLOYD L.
分类号	E21B25/14	主分类号	E21B25/14
代理机构		代理人
主权项
地址

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