Film sonore et dispositif pour sa reproduction,申请号FRD38818-传众专利搜索

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发明名称	Film sonore et dispositif pour sa reproduction
摘要
申请公布号	FR38818(E)	申请公布日期	1931.07.31
申请号	FRD38818	申请日期	1930.07.17
申请人	SELENOPHON LICHT-UND TONBILDGESELLSCHAFT M.B.H.	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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