Improvements in apparatus for recording and reproducing sound,申请号GB19400003819-传众专利搜索

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发明名称	Improvements in apparatus for recording and reproducing sound
摘要
申请公布号	GB538527(A)	申请公布日期	1941.08.07
申请号	GB19400003819	申请日期	1940.02.29
申请人	HENRY DAVIES	发明人
分类号	G11B3/02	主分类号	G11B3/02
代理机构		代理人
主权项
地址

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