An improved arrangement for the reproduction of sound,申请号GB19410004536-传众专利搜索

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发明名称	An improved arrangement for the reproduction of sound
摘要
申请公布号	GB548357(A)	申请公布日期	1942.10.07
申请号	GB19410004536	申请日期	1941.04.04
申请人	OTTO KURT KOLB;DAVID WHITEHEAD BOSTON	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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