Removable thread for oil savers,申请号US19260131087-传众专利搜索

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发明名称	Removable thread for oil savers
摘要
申请公布号	US1759909(A)	申请公布日期	1930.05.27
申请号	US19260131087	申请日期	1926.08.23
申请人	NEIL LOCKE JAMES	发明人	LOCKE JAMES NEIL
分类号	E21B33/08	主分类号	E21B33/08
代理机构		代理人
主权项
地址

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