Furnace door arch,申请号US19380245798-传众专利搜索

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发明名称	Furnace door arch
摘要
申请公布号	US2197696(A)	申请公布日期	1940.04.16
申请号	US19380245798	申请日期	1938.12.14
申请人	NATIONAL TUBE COMPANY	发明人	JOHNSON LEONARD V.
分类号	F23M7/00	主分类号	F23M7/00
代理机构		代理人
主权项
地址

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