Float-in or check valve,申请号US19480049225-传众专利搜索

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发明名称	Float-in or check valve
摘要
申请公布号	US2572299(A)	申请公布日期	1951.10.23
申请号	US19480049225	申请日期	1948.09.14
申请人	SAMUEL R. CHORNEAU	发明人	ANTOLCH JOHN
分类号	E21B21/10;F16K15/03	主分类号	E21B21/10
代理机构		代理人
主权项
地址

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