Apparatus for core orientation,申请号US19300436512-传众专利搜索

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发明名称	Apparatus for core orientation
摘要
申请公布号	US1859949(A)	申请公布日期	1932.05.24
申请号	US19300436512	申请日期	1930.03.17
申请人	ZUBLIN JOHN A	发明人	ZUBLIN JOHN A.
分类号	E21B25/16	主分类号	E21B25/16
代理机构		代理人
主权项
地址

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