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发明名称
Mechanical pencil
摘要
申请公布号
US2406171(A)
申请公布日期
1946.08.20
申请号
US19430498952
申请日期
1943.08.17
申请人
SCRIPTO MANUFACTURING COMPANY
发明人
SMITH BLANCHARD DRAKE
分类号
B43K21/08;B43K27/00
主分类号
B43K21/08
代理机构
代理人
主权项
地址
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