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发明名称
Calculating machines
摘要
申请公布号
US2923394(A)
申请公布日期
1960.02.02
申请号
US19570635311
申请日期
1957.01.22
申请人
THE NATIONAL CASH REGISTER COMPANY
发明人
FRIEBERG NELSON R.;LARSEN OSCAR F.
分类号
G06C21/02
主分类号
G06C21/02
代理机构
代理人
主权项
地址
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