Perfectionnements aux appareils de reproduction des sons, tels que les récepteurs téléphoniques haut-parleurs,申请号FRD35699-传众专利搜索

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发明名称	Perfectionnements aux appareils de reproduction des sons, tels que les récepteurs téléphoniques haut-parleurs
摘要
申请公布号	FR35699(E)	申请公布日期	1930.03.27
申请号	FRD35699	申请日期	1928.04.28
申请人		发明人	FRANCOIS-XAVIER-LOUI
分类号	H04R1/28;H04R7/02	主分类号	H04R1/28
代理机构		代理人
主权项
地址

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