Sound recording apparatus,申请号US19390265278-传众专利搜索

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发明名称	Sound recording apparatus
摘要
申请公布号	US2206393(A)	申请公布日期	1940.07.02
申请号	US19390265278	申请日期	1939.03.31
申请人	RADIO CORPORATION	发明人	DIMMICK GLENN L.
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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