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发明名称
Drafting pen
摘要
申请公布号
US2483764(A)
申请公布日期
1949.10.04
申请号
US19460701344
申请日期
1946.10.04
申请人
HENRY FRANK
发明人
FRANK HENRY
分类号
B43K17/00
主分类号
B43K17/00
代理机构
代理人
主权项
地址
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