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发明名称
DEVICE FOR HELPING BLIND PERSONS IN ORIENTING
摘要
申请公布号
SU1725881(A1)
申请公布日期
1992.04.15
申请号
SU19894714756
申请日期
1989.07.04
申请人
KASATKIN VALERIJ G,SU
发明人
KASATKIN VALERIJ G,SU
分类号
A61F9/08
主分类号
A61F9/08
代理机构
代理人
主权项
地址
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