Well head control,申请号US19390254543-传众专利搜索

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法人/股东/高管

发明名称	Well head control
摘要
申请公布号	US2261440(A)	申请公布日期	1941.11.04
申请号	US19390254543	申请日期	1939.02.04
申请人	LAYNE LESLIE A	发明人	LAYNE LESLIE A.
分类号	E21B33/03	主分类号	E21B33/03
代理机构		代理人
主权项
地址

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