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发明名称
Tally device
摘要
申请公布号
US2555781(A)
申请公布日期
1951.06.05
申请号
US19480013400
申请日期
1948.03.06
申请人
MARGARET BRISTOL
发明人
BRISTOL MARGARET
分类号
D04B3/00
主分类号
D04B3/00
代理机构
代理人
主权项
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