Perfectionnements aux phonographes,申请号FRD675884-传众专利搜索

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发明名称	Perfectionnements aux phonographes
摘要
申请公布号	FR675884(A)	申请公布日期	1930.02.15
申请号	FRD675884	申请日期	1929.05.29
申请人	THE GRAMOPHONE COMPANY LIMITED	发明人
分类号	G11B3/60	主分类号	G11B3/60
代理机构		代理人
主权项
地址

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