Improvements in and relating to the duplication of sound records obtained by magnetic means,申请号GB19290010932-传众专利搜索

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发明名称	Improvements in and relating to the duplication of sound records obtained by magnetic means
摘要
申请公布号	GB331008(A)	申请公布日期	1930.06.26
申请号	GB19290010932	申请日期	1929.04.09
申请人	CURT STILLE	发明人
分类号	G11B5/86	主分类号	G11B5/86
代理机构		代理人
主权项
地址

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