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发明名称
Improvements in and relating to course-indicating apparatus for vehicles
摘要
申请公布号
GB528555(A)
申请公布日期
1940.10.31
申请号
GB19390013862
申请日期
1939.05.09
申请人
JOHN GORDON HARGRAVE;DENIS CEDRIC WILLIAMS
发明人
分类号
G09B29/10
主分类号
G09B29/10
代理机构
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