Improvements in or connected with the reproduction of sound from photographic sound records,申请号GB19290020590-传众专利搜索

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发明名称	Improvements in or connected with the reproduction of sound from photographic sound records
摘要
申请公布号	GB337742(A)	申请公布日期	1930.11.04
申请号	GB19290020590	申请日期	1929.07.04
申请人	FREDERICK KENNETH CROWTHER;BRITISH TALKING PICTURES LIMITED	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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