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发明名称
Navigators plotting board
摘要
申请公布号
US2813338(A)
申请公布日期
1957.11.19
申请号
US19530359718
申请日期
1953.06.05
申请人
ESTELLE MEYERS MAE
发明人
MEYERS MAE ESTELLE
分类号
G01C21/20
主分类号
G01C21/20
代理机构
代理人
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