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发明名称
Computing apparatus
摘要
申请公布号
US2551440(A)
申请公布日期
1951.05.01
申请号
US19480062650
申请日期
1948.11.30
申请人
JOHN KREITNER
发明人
KREITNER JOHN
分类号
G06G5/00
主分类号
G06G5/00
代理机构
代理人
主权项
地址
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