Locking and clamping means for core barrels,申请号US19320592883-传众专利搜索

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发明名称	Locking and clamping means for core barrels
摘要
申请公布号	US1960620(A)	申请公布日期	1934.05.29
申请号	US19320592883	申请日期	1932.02.15
申请人	DUFFY PETER J	发明人	DUFFY PETER J.
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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