Keyboards and keyboard learning aids,申请号GB20020020538-传众专利搜索

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发明名称	Keyboards and keyboard learning aids
摘要
申请公布号	GB0220538(D0)	申请公布日期	2002.10.09
申请号	GB20020020538	申请日期	2002.09.04
申请人	MASSIE, CHARLES R	发明人
分类号	G06F3/02;G06F3/023	主分类号	G06F3/02
代理机构		代理人
主权项
地址

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