Improvements in light weight phonograph record,申请号GB19500005982-传众专利搜索

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发明名称	Improvements in light weight phonograph record
摘要
申请公布号	GB667486(A)	申请公布日期	1952.03.05
申请号	GB19500005982	申请日期	1950.03.09
申请人	RADIO CORPORATION OF AMERICA	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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