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发明名称
Apparatus for improving the writing characteristics of ball point pens
摘要
申请公布号
US3182344(A)
申请公布日期
1965.05.11
申请号
US19610131304
申请日期
1961.08.14
申请人
METALTRONICS, INC.
发明人
HARVEY RICHARD F.
分类号
B43K1/08
主分类号
B43K1/08
代理机构
代理人
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