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发明名称
Device for aiding in chart making
摘要
申请公布号
US2556518(A)
申请公布日期
1951.06.12
申请号
US19470744881
申请日期
1947.04.30
申请人
ROSS BRYNGELSON
发明人
BRYNGELSON ROSS
分类号
主分类号
代理机构
代理人
主权项
地址
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