Improvements in or relating to sound reproducing devices,申请号GB19330023199-传众专利搜索

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发明名称	Improvements in or relating to sound reproducing devices
摘要
申请公布号	GB423807(A)	申请公布日期	1935.02.08
申请号	GB19330023199	申请日期	1933.08.19
申请人	FERRANTI, LIMITED;MAURICE KENYON TAYLOR	发明人
分类号	H04R9/02	主分类号	H04R9/02
代理机构		代理人
主权项
地址

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