Improvements in and relating to the recording of sound on films,申请号GB19480005287-传众专利搜索

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发明名称	Improvements in and relating to the recording of sound on films
摘要
申请公布号	GB646185(A)	申请公布日期	1950.11.15
申请号	GB19480005287	申请日期	1948.02.23
申请人	CHARLES VINTEN	发明人
分类号	G03B31/00;G11B7/00	主分类号	G03B31/00
代理机构		代理人
主权项
地址

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