Time recording punch
    3.
    发明授权
    Time recording punch 失效
    时间记录打孔

    公开(公告)号:US2013530A

    公开(公告)日:1935-09-03

    申请号:US74974334

    申请日:1934-10-24

    Applicant: IBM

    Inventor: WELLS GORDEN S

Patent Agency Ranking