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经营范围
发明名称
Sharpening device
摘要
申请公布号
US2459945(A)
申请公布日期
1949.01.25
申请号
US19460651762
申请日期
1946.03.04
申请人
JOHNSTON BENJAMIN H
发明人
JOHNSTON BENJAMIN H.
分类号
B24D15/08
主分类号
B24D15/08
代理机构
代理人
主权项
地址
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