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发明名称
Card punching machine
摘要
申请公布号
US2240549(A)
申请公布日期
1941.05.06
申请号
US19390272989
申请日期
1939.05.11
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
CARROLL FRED M.
分类号
G06C11/08
主分类号
G06C11/08
代理机构
代理人
主权项
地址
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