Core taking apparatus,申请号US19370161185-传众专利搜索

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发明名称	Core taking apparatus
摘要
申请公布号	US2184343(A)	申请公布日期	1939.12.26
申请号	US19370161185	申请日期	1937.08.27
申请人	REED ROLLER BIT COMPANY	发明人	HARRINGTON GEORGE 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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