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公开(公告)号：US2941739A
公开(公告)日：1960-06-21
申请号：US74154458
申请日：1958-06-12
Applicant: IBM
Inventor： BURKE THOMAS ULIC , HUGHES FREDERICK GEORGE , HANS REICHLE , VINSON THOMAS LEON
CPC classification number: G06K17/0012 , G11B15/66 , G11B15/6835
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