High pressure closure,申请号US19390273839-传众专利搜索

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发明名称	High pressure closure
摘要
申请公布号	US2190716(A)	申请公布日期	1940.02.20
申请号	US19390273839	申请日期	1939.05.16
申请人	SPERRY-SUN WELL SURVEYING COMPANY	发明人	KOTHNY GOTTDANK L.
分类号	E21B47/022	主分类号	E21B47/022
代理机构		代理人
主权项
地址

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