Pressure responsive pipe joint seal,申请号US19490090678-传众专利搜索

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发明名称	Pressure responsive pipe joint seal
摘要
申请公布号	US2631871(A)	申请公布日期	1953.03.17
申请号	US19490090678	申请日期	1949.04.30
申请人	STONE ALBERT L	发明人	STONE ALBERT L.
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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