Procédé d'enregistrement de vibrations acoustiques,申请号FRD686016-传众专利搜索

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发明名称	Procédé d'enregistrement de vibrations acoustiques
摘要
申请公布号	FR686016(A)	申请公布日期	1930.07.21
申请号	FRD686016	申请日期	1929.03.02
申请人	SOCIETE INDEPENDANTE DE TELEGRAPHIE SANS FIL	发明人
分类号	G11B11/00	主分类号	G11B11/00
代理机构		代理人
主权项
地址

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