établissement d'enregistrements acoustiques sur films,申请号FRD691060-传众专利搜索

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发明名称	établissement d'enregistrements acoustiques sur films
摘要
申请公布号	FR691060(A)	申请公布日期	1930.10.01
申请号	FRD691060	申请日期	1930.03.04
申请人	THE GRAMOPHONE COMPANY LIMITED	发明人
分类号	G11B7/28	主分类号	G11B7/28
代理机构		代理人
主权项
地址

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