Leak-resisting pipe thread,申请号US19380230968-传众专利搜索

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发明名称	Leak-resisting pipe thread
摘要
申请公布号	US2177100(A)	申请公布日期	1939.10.24
申请号	US19380230968	申请日期	1938.09.21
申请人	THE NATIONAL SUPPLY COMPANY	发明人	FRAME WILLIAM M.
分类号	E21B17/042;F16L15/04;F16L15/06	主分类号	E21B17/042
代理机构		代理人
主权项
地址

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