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发明名称
NAVIGATIONAL AID
摘要
申请公布号
GB2215111(B)
申请公布日期
1991.11.27
申请号
GB19880003201
申请日期
1988.02.11
申请人
JOHN JAMES * KELLY;LANCE DAVID * SHAKESPEAR
发明人
JOHN JAMES * KELLY;LANCE DAVID * SHAKESPEAR
分类号
G09B29/00;G09B29/10
主分类号
G09B29/00
代理机构
代理人
主权项
地址
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