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Invention Grant
US2343463A Indicating control apparatus for perforating machines 失效
打孔机的指示控制装置

  • Patent Title: Indicating control apparatus for perforating machines
  • Patent Title (中): 打孔机的指示控制装置
  • Application No.: US50112443
    Application Date: 1943-09-03
  • Publication No.: US2343463A
    Publication Date: 1944-03-07
  • Inventor: WARD LEATHERS , BAILEY WILLIAM J A
  • Applicant: IBM
  • Assignee: Ibm
  • Current Assignee: Ibm
  • Priority: US50112443 1943-09-03
Indicating control apparatus for perforating machines
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