Sound recording and reproducing systems,申请号GB19320009069-传众专利搜索

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发明名称	Sound recording and reproducing systems
摘要
申请公布号	GB384517(A)	申请公布日期	1932.12.08
申请号	GB19320009069	申请日期	1932.03.29
申请人	RADIO CORPORATION OF AMERICA	发明人
分类号	G11B31/00	主分类号	G11B31/00
代理机构		代理人
主权项
地址

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