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发明名称
Lawn mower sharpener
摘要
申请公布号
US2470335(A)
申请公布日期
1949.05.17
申请号
US19480047477
申请日期
1948.09.02
申请人
BROMERT LEO I
发明人
BROMERT LEO I.
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主分类号
代理机构
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