Improvements in or relating to loudspeakers,申请号GB19450006814-传众专利搜索

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发明名称	Improvements in or relating to loudspeakers
摘要
申请公布号	GB589195(A)	申请公布日期	1947.06.13
申请号	GB19450006814	申请日期	1945.03.19
申请人	GUY R. FOUNTAIN LIMITED;HENRY JOHN HOULGATE	发明人
分类号	H04R7/20	主分类号	H04R7/20
代理机构		代理人
主权项
地址

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