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发明名称
Time card rack
摘要
申请公布号
US2710473(A)
申请公布日期
1955.06.14
申请号
US19540432197
申请日期
1954.05.25
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
KRESS GEORGE H.;SUNDBERG CARL W.
分类号
B42F17/08
主分类号
B42F17/08
代理机构
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