Improvements in or relating to optical sound recording,申请号GB19350035143-传众专利搜索

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发明名称	Improvements in or relating to optical sound recording
摘要
申请公布号	GB461375(A)	申请公布日期	1937.02.16
申请号	GB19350035143	申请日期	1935.12.18
申请人	KLANGFILM G.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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