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发明名称
Calendar attachment for fountain pens
摘要
申请公布号
US1828132(A)
申请公布日期
1931.10.20
申请号
US19300432945
申请日期
1930.03.03
申请人
DOVER DAVID L
发明人
DOVER DAVID L.
分类号
B43K29/087
主分类号
B43K29/087
代理机构
代理人
主权项
地址
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