Method of producing hardened valve seats,申请号US19390274959-传众专利搜索

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发明名称	Method of producing hardened valve seats
摘要
申请公布号	US2268528(A)	申请公布日期	1941.12.30
申请号	US19390274959	申请日期	1939.05.22
申请人	BUDD INDUCTION HEATING, INC.	发明人	SOMES HOWARD E.
分类号	C21D9/00;F01L3/02;H05B6/02	主分类号	C21D9/00
代理机构		代理人
主权项
地址

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