Well bore pressure regulator apparatus,申请号US19630327220-传众专利搜索

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发明名称	Well bore pressure regulator apparatus
摘要
申请公布号	US3294113(A)	申请公布日期	1966.12.27
申请号	US19630327220	申请日期	1963.12.02
申请人	BAKER OIL TOOLS, INC.	发明人	CHENOWETH DAVID V.
分类号	E21B34/08	主分类号	E21B34/08
代理机构		代理人
主权项
地址

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