Accounting machine
    44.
    发明授权
    Accounting machine 失效
    会计机

    公开(公告)号:US1950480A

    公开(公告)日:1934-03-13

    申请号:US46872230

    申请日:1930-07-17

    Applicant: IBM

    Inventor: CARROLL FRED M

    CPC classification number: G06C7/10

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