Well flowing valve,申请号US19360097511-传众专利搜索

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发明名称	Well flowing valve
摘要
申请公布号	US2179226(A)	申请公布日期	1939.11.07
申请号	US19360097511	申请日期	1936.08.24
申请人	BRYAN THOMAS E	发明人	BRYAN THOMAS E.
分类号	E21B43/12	主分类号	E21B43/12
代理机构		代理人
主权项
地址

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