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发明名称
Extensible tip for dividers
摘要
申请公布号
US2510805(A)
申请公布日期
1950.06.06
申请号
US19450596878
申请日期
1945.05.31
申请人
BRADLEY DEWEY EDWARD
发明人
DEWEY EDWARD BRADLEY
分类号
B43L9/12
主分类号
B43L9/12
代理机构
代理人
主权项
地址
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