Closure element for air ducts,申请号US19490068987-传众专利搜索

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发明名称	Closure element for air ducts
摘要
申请公布号	US2599075(A)	申请公布日期	1952.06.03
申请号	US19490068987	申请日期	1949.01.03
申请人	STROUP DONALD H	发明人	STROUP DONALD H.
分类号	F24F13/14	主分类号	F24F13/14
代理机构		代理人
主权项
地址

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