Automatic fire shutter mechanism,申请号US19400356963-传众专利搜索

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发明名称	Automatic fire shutter mechanism
摘要
申请公布号	US2302811(A)	申请公布日期	1942.11.24
申请号	US19400356963	申请日期	1940.09.16
申请人	THE BELL & HOWELL COMPANY	发明人	STECHBART BRUNO
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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