Dispositif vibrant électromagnétique destiné en particulier à l'enregistrement et à la reproduction acoustiques,申请号FRD693435-传众专利搜索

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发明名称	Dispositif vibrant électromagnétique destiné en particulier à l'enregistrement et à la reproduction acoustiques
摘要
申请公布号	FR693435(A)	申请公布日期	1930.11.20
申请号	FRD693435	申请日期	1930.04.05
申请人	THE GRAMOPHONE COMPANY LIMITED	发明人
分类号	H04R11/00;H04R11/08	主分类号	H04R11/00
代理机构		代理人
主权项
地址

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