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Invention Grant
US2019900A Accounting machine 失效

  • Patent Title: Accounting machine
  • Application No.: US71169234
    Application Date: 1934-02-17
  • Publication No.: US2019900A
    Publication Date: 1935-11-05
  • Inventor: FULLER FREDERICK L
  • Applicant: IBM
  • Assignee: Ibm
  • Current Assignee: Ibm
  • Priority: US71169234 1934-02-17; US49015530 1930-10-21
  • Main IPC: G06C7/08
  • IPC: G06C7/08
Accounting machine
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