Perfectionnements aux enregistrements mécaniques du son tels que les disques pour phonographes,申请号FRD704719-传众专利搜索

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发明名称	Perfectionnements aux enregistrements mécaniques du son tels que les disques pour phonographes
摘要
申请公布号	FR704719(A)	申请公布日期	1931.05.26
申请号	FRD704719	申请日期	1930.10.29
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人
分类号	A47B81/06;G11B33/04	主分类号	A47B81/06
代理机构		代理人
主权项
地址

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