Means for measuring and controlling fluid pressures,申请号US19380183156-传众专利搜索

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发明名称	Means for measuring and controlling fluid pressures
摘要
申请公布号	US2203577(A)	申请公布日期	1940.06.04
申请号	US19380183156	申请日期	1938.01.03
申请人	MORDICA O. JOHNSTON	发明人	O'NEILL FRANK E.;WHEALTON ROWLAND G.
分类号	E21B47/06	主分类号	E21B47/06
代理机构		代理人
主权项
地址

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