Improvements in sirens,申请号GB19370034872-传众专利搜索

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发明名称	Improvements in sirens
摘要
申请公布号	GB488530(A)	申请公布日期	1938.07.08
申请号	GB19370034872	申请日期	1937.12.16
申请人	HELIN HAGENER ELEKTRIZITAETS-INDUSTRIE G.M.B.H.;XARL AUGUST SCHMACKE	发明人
分类号	G10K7/04	主分类号	G10K7/04
代理机构		代理人
主权项
地址

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