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发明名称
Navigation training apparatus
摘要
申请公布号
US2965976(A)
申请公布日期
1960.12.27
申请号
US19560590693
申请日期
1956.06.11
申请人
GENERAL PRECISION, INC.
发明人
SCHWARM EDWARD G.
分类号
G09B9/24
主分类号
G09B9/24
代理机构
代理人
主权项
地址
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