Dispositif d'enregistrement et de reproduction des sons,申请号FRD948451-传众专利搜索

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发明名称	Dispositif d'enregistrement et de reproduction des sons
摘要
申请公布号	FR948451(A)	申请公布日期	1949.08.02
申请号	FRD948451	申请日期	1947.06.11
申请人		发明人	PROT ETIENNE-MARCEL
分类号	G01D15/34;G11B7/00;G11B7/24;G11B27/13	主分类号	G01D15/34
代理机构		代理人
主权项
地址

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