Improvements in or connected with loud speakers,申请号GB19320016806-传众专利搜索

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发明名称	Improvements in or connected with loud speakers
摘要
申请公布号	GB402847(A)	申请公布日期	1933.12.14
申请号	GB19320016806	申请日期	1932.06.14
申请人	GEORGE THOMAS ALLEN	发明人
分类号	H04R7/00	主分类号	H04R7/00
代理机构		代理人
主权项
地址

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