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发明名称
Drawing board
摘要
申请公布号
US1849493(A)
申请公布日期
1932.03.15
申请号
US19280254739
申请日期
1928.02.16
申请人
LARKIN DENNIS F
发明人
LARKIN DENNIS F.
分类号
B43L5/00
主分类号
B43L5/00
代理机构
代理人
主权项
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