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发明名称
INNOVATION TO IMPROVE THE VISIBILITY OF INDICIA OF SIGNS IN ADVERSE LIGHTING CONDITIONS
摘要
申请公布号
GB9023968(D0)
申请公布日期
1990.12.19
申请号
GB19900023968
申请日期
1990.11.05
申请人
DAVID WRIGHT & ASSOCIATES
发明人
分类号
主分类号
代理机构
代理人
主权项
地址
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