Méthode et dispositifs d'enregistrement et de reproduction des sons, plus particulièrement applicables aux film parlant et sonore,申请号FRD700454-传众专利搜索

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发明名称	Méthode et dispositifs d'enregistrement et de reproduction des sons, plus particulièrement applicables aux film parlant et sonore
摘要
申请公布号	FR700454(A)	申请公布日期	1931.03.02
申请号	FRD700454	申请日期	1929.02.08
申请人		发明人	BRAMI JOSEPH
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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