Tubing hanger for oil wells,申请号US19310517137-传众专利搜索

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法人/股东/高管

发明名称	Tubing hanger for oil wells
摘要
申请公布号	US1938062(A)	申请公布日期	1933.12.05
申请号	US19310517137	申请日期	1931.02.20
申请人	BROWN CICERO C	发明人	BROWN CICERO C.
分类号	E21B33/04	主分类号	E21B33/04
代理机构		代理人
主权项
地址

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