Perfectionnements aux valves de lumière employées pour l'enregistrement des sons,申请号FRD801550-传众专利搜索

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发明名称	Perfectionnements aux valves de lumière employées pour l'enregistrement des sons
摘要
申请公布号	FR801550(A)	申请公布日期	1936.08.06
申请号	FRD801550	申请日期	1936.02.05
申请人	ELECTRICAL RESEARCH PRODUCTS 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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