Improvements in or relating to loudspeakers,申请号GB19480018781D-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	GB675104(A)	申请公布日期	1952.07.02
申请号	GB19480018781D	申请日期	1948.07.16
申请人	ELECTRIC MUSICAL INDUSTRIES LIMITED	发明人	RASELL JOHN ALBERT
分类号	H04R7/12	主分类号	H04R7/12
代理机构		代理人
主权项
地址

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