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发明名称
Ray aviation compass
摘要
申请公布号
US1948552(A)
申请公布日期
1934.02.27
申请号
US19320611466
申请日期
1932.05.16
申请人
LEO WEBER SIGVARD;JENSEN EDWARD W
发明人
WEBER SIGVARD LEO;JENSEN EDWARD W.
分类号
B64F1/20
主分类号
B64F1/20
代理机构
代理人
主权项
地址
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