Sound records for optical sound reproduction,申请号GB19320011631-传众专利搜索

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发明名称	Sound records for optical sound reproduction
摘要
申请公布号	GB402074(A)	申请公布日期	1933.11.22
申请号	GB19320011631	申请日期	1932.04.22
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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