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发明名称
Record card counting, stacking, and conveying mechanism
摘要
申请公布号
US2642787(A)
申请公布日期
1953.06.23
申请号
US19510211416
申请日期
1951.02.16
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
CARROLL FRED M.
分类号
主分类号
代理机构
代理人
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