Automatic ventilation device,申请号US19510225817-传众专利搜索

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发明名称	Automatic ventilation device
摘要
申请公布号	US2684623(A)	申请公布日期	1954.07.27
申请号	US19510225817	申请日期	1951.05.11
申请人	JOSEPH MAJOR	发明人	MAJOR JOSEPH
分类号	F04D29/52	主分类号	F04D29/52
代理机构		代理人
主权项
地址

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