Fire shutter automatic release,申请号US19250054621-传众专利搜索

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发明名称	Fire shutter automatic release
摘要
申请公布号	US1749971(A)	申请公布日期	1930.03.11
申请号	US19250054621	申请日期	1925.09.05
申请人	THE PRECISION MACHINE CO., INC.	发明人	DINA AUGUSTO
分类号	G03B21/18	主分类号	G03B21/18
代理机构		代理人
主权项
地址

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