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发明名称
Color-coded concept device for the visually handicapped
摘要
申请公布号
GB2011145(A)
申请公布日期
1979.07.04
申请号
GB19780049024
申请日期
1978.12.19
申请人
TONELLI R R
发明人
分类号
G09B21/00;(IPC1-7):G09B21/00
主分类号
G09B21/00
代理机构
代理人
主权项
地址
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