Perfectionnements dans les diffuseurs pour la reproduction des ondes sonores,申请号FRD692972-传众专利搜索

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发明名称	Perfectionnements dans les diffuseurs pour la reproduction des ondes sonores
摘要
申请公布号	FR692972(A)	申请公布日期	1930.11.13
申请号	FRD692972	申请日期	1929.07.05
申请人		发明人	GOGNY GEORGES
分类号	H04R7/12	主分类号	H04R7/12
代理机构		代理人
主权项
地址

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