Adjustable building ventilator,申请号US19520311262-传众专利搜索

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发明名称	Adjustable building ventilator
摘要
申请公布号	US2722981(A)	申请公布日期	1955.11.08
申请号	US19520311262	申请日期	1952.09.24
申请人	LESLIE FREELAND H	发明人	LESLIE FREELAND H.
分类号	E06B7/082;F24F13/08	主分类号	E06B7/082
代理机构		代理人
主权项
地址

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