Improvements in or relating to gramophone tone arms,申请号GB19290008249-传众专利搜索

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发明名称	Improvements in or relating to gramophone tone arms
摘要
申请公布号	GB329742(A)	申请公布日期	1930.05.29
申请号	GB19290008249	申请日期	1929.03.13
申请人	FREDRICK ALBERT BOYD	发明人
分类号	G11B3/00	主分类号	G11B3/00
代理机构		代理人
主权项
地址

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