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经营范围
发明名称
Navigating instrument
摘要
申请公布号
US2253279(A)
申请公布日期
1941.08.19
申请号
US19400353513
申请日期
1940.08.21
申请人
ERNEST R. BECKER
发明人
LOEW PAUL W.
分类号
G01C21/20
主分类号
G01C21/20
代理机构
代理人
主权项
地址
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