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发明名称
Keyboards with perceivable colour differences
摘要
申请公布号
GB9402716(D0)
申请公布日期
1994.04.06
申请号
GB19940002716
申请日期
1994.02.11
申请人
SO HENRY
发明人
分类号
B41J5/10;G09B13/04
主分类号
B41J5/10
代理机构
代理人
主权项
地址
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