Core barrel for oil well apparatus,申请号US19360061611-传众专利搜索

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发明名称	Core barrel for oil well apparatus
摘要
申请公布号	US2145170(A)	申请公布日期	1939.01.24
申请号	US19360061611	申请日期	1936.01.30
申请人	HARRY PENNINGTON	发明人	FRENZEL WILBUR G.
分类号	E21B25/02	主分类号	E21B25/02
代理机构		代理人
主权项
地址

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