Dispositif pour l'enregistrement photographique de courants alternatifs,申请号FRD683845-传众专利搜索

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发明名称	Dispositif pour l'enregistrement photographique de courants alternatifs
摘要
申请公布号	FR683845(A)	申请公布日期	1930.06.18
申请号	FRD683845	申请日期	1929.10.23
申请人	SELENOPHON LICHT-UND TONBILD GESELLSCHAFT 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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