Improvements in or relating to electro-magnetic vibratory devices, such for example as loudspeakers,申请号GB19290011272-传众专利搜索

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发明名称	Improvements in or relating to electro-magnetic vibratory devices, such for example as loudspeakers
摘要
申请公布号	GB332238(A)	申请公布日期	1930.07.11
申请号	GB19290011272	申请日期	1929.04.11
申请人	WIRELESS MUSIC LIMITED;FRANCIS GRANVILLE GORDON DAVEY	发明人
分类号	H04R11/00	主分类号	H04R11/00
代理机构		代理人
主权项
地址

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