Well cementing apparatus,申请号US19470730342-传众专利搜索

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法人/股东/高管

发明名称	Well cementing apparatus
摘要
申请公布号	US2644525(A)	申请公布日期	1953.07.07
申请号	US19470730342	申请日期	1947.02.24
申请人	BAKER OIL TOOLS, INC.	发明人	LEE FRANCIS HAMPTON
分类号	E21B33/14	主分类号	E21B33/14
代理机构		代理人
主权项
地址

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