An electrical arrangement for recording sound,申请号GB19410008222-传众专利搜索

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发明名称	An electrical arrangement for recording sound
摘要
申请公布号	GB552315(A)	申请公布日期	1943.04.01
申请号	GB19410008222	申请日期	1941.06.30
申请人	GUNNAR ERIK MAGNUS CORIN;NILS ERICSSON	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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