Improved method for the mechanical recording of sound,申请号GB19390022922-传众专利搜索

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发明名称	Improved method for the mechanical recording of sound
摘要
申请公布号	GB533037(A)	申请公布日期	1941.02.05
申请号	GB19390022922	申请日期	1939.08.08
申请人	PHILIPS LAMPS LIMITED	发明人
分类号	G11B11/00	主分类号	G11B11/00
代理机构		代理人
主权项
地址

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