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发明名称
PROCEDE DE REPRODUCTION D'UN PLAN-GUIDE POUR LE DEPLACEMENT DES NON-VOYANTS ET PLAN-GUIDE OBTENU SELON CE PROCEDE.
摘要
申请公布号
FR2681971(B1)
申请公布日期
1994.10.14
申请号
FR19910012162
申请日期
1991.10.01
申请人
MANGOT MAURICE
发明人
MANGOT MAURICE
分类号
G09B21/00;G09B29/12;(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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