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发明名称
Portable drawing board
摘要
申请公布号
US2896328(A)
申请公布日期
1959.07.28
申请号
US19530372362
申请日期
1953.08.04
申请人
CLAUDE GRADY
发明人
GRADY CLAUDE
分类号
B43L5/00
主分类号
B43L5/00
代理机构
代理人
主权项
地址
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