Duplicating phonograph record matrices,申请号GB19350000033-传众专利搜索

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发明名称	Duplicating phonograph record matrices
摘要
申请公布号	GB432003(A)	申请公布日期	1935.07.18
申请号	GB19350000033	申请日期	1935.01.01
申请人	ELECTRICAL RESEARCH PRODUCTS INC.	发明人
分类号	G11B3/70	主分类号	G11B3/70
代理机构		代理人
主权项
地址

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