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12.
公开(公告)号:US3215070A
公开(公告)日:1965-11-02
申请号:US33119963
申请日:1963-12-17
Applicant: IBM
Inventor: ABERNATHY ROGER E , HARPER LEONARD R
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13.Computer circuit for performing serial addition and subtraction 失效
Title translation: 用于执行串行加法和减法的计算机电路公开(公告)号:US3209131A
公开(公告)日:1965-09-28
申请号:US4211460
申请日:1960-07-11
Applicant: IBM
Inventor: HARPER LEONARD R
CPC classification number: G06F7/504
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公开(公告)号:US2496585A
公开(公告)日:1950-02-07
申请号:US3539148
申请日:1948-06-26
Applicant: IBM
Inventor: HARPER LEONARD R
IPC: G06M1/08
CPC classification number: G06M1/08
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公开(公告)号:CA748663A
公开(公告)日:1966-12-20
申请号:CA748663D
Applicant: IBM
Inventor: ABERNATHY ROGER E , HARPER LEONARD R
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