Dispositif acoustique de signalisation d'une direction donnée, sans visibilité,申请号FRD785615-传众专利搜索

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发明名称	Dispositif acoustique de signalisation d'une direction donnée, sans visibilité
摘要
申请公布号	FR785615(A)	申请公布日期	1935.08.14
申请号	FRD785615	申请日期	1935.02.02
申请人		发明人	FRANCOIS VAILLANT, VICTOR,
分类号	G08B3/00	主分类号	G08B3/00
代理机构		代理人
主权项
地址

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