Improvements in loud speaker motors,申请号GB19300014333-传众专利搜索

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发明名称	Improvements in loud speaker motors
摘要
申请公布号	GB355315(A)	申请公布日期	1931.08.10
申请号	GB19300014333	申请日期	1930.05.09
申请人	CHARLES WALLACE PETERSON	发明人
分类号	H04R9/04	主分类号	H04R9/04
代理机构		代理人
主权项
地址

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