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经营范围
发明名称
Trainer for airplane pilots
摘要
申请公布号
US2212931(A)
申请公布日期
1940.08.27
申请号
US19380200253
申请日期
1938.04.05
申请人
COLVIN HAROLD R
发明人
COLVIN HAROLD R.
分类号
G09B9/12
主分类号
G09B9/12
代理机构
代理人
主权项
地址
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