Steam heating system,申请号US19300425681-传众专利搜索

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发明名称	Steam heating system
摘要
申请公布号	US1977303(A)	申请公布日期	1934.10.16
申请号	US19300425681	申请日期	1930.02.03
申请人	C. A. DUNHAM COMPANY	发明人	JR. DAVID N. CROSTHWAIT,
分类号	F24D1/00	主分类号	F24D1/00
代理机构		代理人
主权项
地址

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