Method of making valves,申请号US19310537828-传众专利搜索

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发明名称	Method of making valves
摘要
申请公布号	US2093772(A)	申请公布日期	1937.09.21
申请号	US19310537828	申请日期	1931.05.16
申请人	THOMPSON PRODUCTS, INCORPORATED	发明人	COLWELL ARCHIE T.
分类号	B21K1/22;F01L3/02	主分类号	B21K1/22
代理机构		代理人
主权项
地址

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