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公开(公告)号:US2981140A
公开(公告)日:1961-04-25
申请号:US58038156
申请日:1956-04-24
Applicant: BURROUGHS CORP
Inventor: OGLE JAMES A
IPC: G09F9/40 , G09G3/04
CPC classification number: G09F9/405 , G09G3/045