Perfectionnements aux avertisseurs électro-magnétiques,申请号FRD847441-传众专利搜索

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发明名称	Perfectionnements aux avertisseurs électro-magnétiques
摘要
申请公布号	FR847441(A)	申请公布日期	1939.10.10
申请号	FRD847441	申请日期	1938.06.13
申请人	ANDRE CITROE:N	发明人
分类号	G10K9/13	主分类号	G10K9/13
代理机构		代理人
主权项
地址

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