Improvements in loud speakers,申请号GB19340013430-传众专利搜索

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发明名称	Improvements in loud speakers
摘要
申请公布号	GB426846(A)	申请公布日期	1935.04.10
申请号	GB19340013430	申请日期	1934.05.03
申请人	THE ROLA COMPANY	发明人
分类号	H04R9/02;H04R9/06	主分类号	H04R9/02
代理机构		代理人
主权项
地址

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