Improvements in or relating to the production of sound records for synchronous working with kinematograph pictures,申请号GB19290023579-传众专利搜索

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发明名称	Improvements in or relating to the production of sound records for synchronous working with kinematograph pictures
摘要
申请公布号	GB318143(A)	申请公布日期	1930.10.31
申请号	GB19290023579	申请日期	1929.07.31
申请人	MAYFILM G.M.B.H.	发明人
分类号		主分类号
代理机构		代理人
主权项
地址

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