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发明名称
Check valve-pins for fountain pens
摘要
申请公布号
US2748749(A)
申请公布日期
1956.06.05
申请号
US19520317453
申请日期
1952.10.29
申请人
VALENTINE PALSIC
发明人
PALSIC VALENTINE
分类号
B43K5/18
主分类号
B43K5/18
代理机构
代理人
主权项
地址
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