Dispositif de contrôle pour appareil reproducteur optico-électrique, porteur de sons,申请号FRD685116-传众专利搜索

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发明名称	Dispositif de contrôle pour appareil reproducteur optico-électrique, porteur de sons
摘要
申请公布号	FR685116(A)	申请公布日期	1930.07.04
申请号	FRD685116	申请日期	1929.11.18
申请人	SIEMENS & HALSKE AKTIEN-GESELLSCHAFT	发明人
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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