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发明名称
Perforated card reader
摘要
申请公布号
US2957623(A)
申请公布日期
1960.10.25
申请号
US19570701388
申请日期
1957.12.09
申请人
GENERAL ELECTRIC COMPANY
发明人
SNELL JACOB KIRK;ROGERS DONALD F.;RHOADES JOHN M.
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主分类号
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