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发明名称
Writing tablet
摘要
申请公布号
US2367608(A)
申请公布日期
1945.01.16
申请号
US19440521502
申请日期
1944.02.08
申请人
LEON PONNOCK
发明人
PONNOCK LEON
分类号
B43L1/12
主分类号
B43L1/12
代理机构
代理人
主权项
地址
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