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发明名称
Subtracting tabulator
摘要
申请公布号
US2056363(A)
申请公布日期
1936.10.06
申请号
US19310534583
申请日期
1931.05.02
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
PEIRCE JOHN ROYDEN
分类号
主分类号
代理机构
代理人
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