Means for taking well cores,申请号US19370164712-传众专利搜索

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发明名称	Means for taking well cores
摘要
申请公布号	US2210464(A)	申请公布日期	1940.08.06
申请号	US19370164712	申请日期	1937.09.20
申请人	O'LEARY CHARLES M	发明人	O'LEARY CHARLES M.
分类号	E21B49/06	主分类号	E21B49/06
代理机构		代理人
主权项
地址

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