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经营范围
发明名称
Sharpening apparatus
摘要
申请公布号
US2447418(A)
申请公布日期
1948.08.17
申请号
US19440532087
申请日期
1944.04.21
申请人
AMERICAN OPTICAL COMPANY
发明人
MATTER ROGER E.
分类号
B24B3/38
主分类号
B24B3/38
代理机构
代理人
主权项
地址
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