Oil well tool,申请号US19470791120-传众专利搜索

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发明名称	Oil well tool
摘要
申请公布号	US2643723(A)	申请公布日期	1953.06.30
申请号	US19470791120	申请日期	1947.12.11
申请人	LYNES, INC.	发明人	LYNES JOHN
分类号	E21B33/124;E21B33/129	主分类号	E21B33/124
代理机构		代理人
主权项
地址

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