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发明名称
Perforated card verifying device
摘要
申请公布号
US2043308(A)
申请公布日期
1936.06.09
申请号
US19290365511
申请日期
1929.05.23
申请人
INTERNATIONAL BUSINESS MACHINES CORPORATION
发明人
SIMPSON ALBERT HENRY
分类号
G06K5/00
主分类号
G06K5/00
代理机构
代理人
主权项
地址
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