Alarm signal box,申请号US19490082881-传众专利搜索

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发明名称	Alarm signal box
摘要
申请公布号	US2553244(A)	申请公布日期	1951.05.15
申请号	US19490082881	申请日期	1949.03.22
申请人	ELLMANN JACK I	发明人	ELLMANN JACK I.
分类号	G08B25/12	主分类号	G08B25/12
代理机构		代理人
主权项
地址

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