Improvements in or relating to light valves suitable for use in recording sounds,申请号GB19350004009-传众专利搜索

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发明名称	Improvements in or relating to light valves suitable for use in recording sounds
摘要
申请公布号	GB449416(A)	申请公布日期	1936.06.26
申请号	GB19350004009	申请日期	1935.02.07
申请人	SOCIETE DE MATERIEL ACOUSTIQUE INC.	发明人
分类号	G11B7/00	主分类号	G11B7/00
代理机构		代理人
主权项
地址

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