Electro-acoustic device,申请号GB19510019110-传众专利搜索

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法人/股东/高管

发明名称	Electro-acoustic device
摘要
申请公布号	GB704633(A)	申请公布日期	1954.02.24
申请号	GB19510019110	申请日期	1951.08.14
申请人	THE BRUSH DEVELOPMENT COMPANY	发明人
分类号	G10K11/32	主分类号	G10K11/32
代理机构		代理人
主权项
地址

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