Core taking apparatus,申请号US19290332536-传众专利搜索

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发明名称	Core taking apparatus
摘要
申请公布号	US1847424(A)	申请公布日期	1932.03.01
申请号	US19290332536	申请日期	1929.01.14
申请人	BARRETT GEORGE J;SOSTHENE ROBICHAUX	发明人	BARRETT GEORGE J.;ROBICHAUX SOSTHENE
分类号	E21B25/04	主分类号	E21B25/04
代理机构		代理人
主权项
地址

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