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发明名称
Totalizing key punch
摘要
申请公布号
US2672286(A)
申请公布日期
1954.03.16
申请号
US19510264328
申请日期
1951.12.31
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
LUHN HANS P.
分类号
G06F7/46
主分类号
G06F7/46
代理机构
代理人
主权项
地址
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