Improvements in the recording and reproduction of oscillations,申请号GB19470003829-传众专利搜索

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发明名称	Improvements in the recording and reproduction of oscillations
摘要
申请公布号	GB633000(A)	申请公布日期	1949.12.05
申请号	GB19470003829	申请日期	1947.02.10
申请人	N. V. PHILIPS' GLOEILAMPENFABRIEKEN	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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