Improved method and apparatus for photo-electric sound reproduction,申请号GB19350010245-传众专利搜索

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发明名称	Improved method and apparatus for photo-electric sound reproduction
摘要
申请公布号	GB441437(A)	申请公布日期	1936.01.20
申请号	GB19350010245	申请日期	1935.04.02
申请人	FERNANDO CRUDO	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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