Combination tubing hanger and blow-out preventer,申请号US19310530649-传众专利搜索

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法人/股东/高管

发明名称	Combination tubing hanger and blow-out preventer
摘要
申请公布号	US1909304(A)	申请公布日期	1933.05.16
申请号	US19310530649	申请日期	1931.04.16
申请人	MUELLER ROBERT A	发明人	MUELLER ROBERT A.
分类号	E21B33/06	主分类号	E21B33/06
代理机构		代理人
主权项
地址

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