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US1651065A Method of exhausting thermionic tubes and like devices 失效
排出热离子管等装置的方法

  • Patent Title: Method of exhausting thermionic tubes and like devices
  • Patent Title (中): 排出热离子管等装置的方法
  • Application No.: US16504527
    Application Date: 1927-01-31
  • Publication No.: US1651065A
    Publication Date: 1927-11-29
  • Inventor: METCALF HERBERT E
  • Applicant: MAGNAVOX CO
  • Assignee: Magnavox Co
  • Current Assignee: Magnavox Co
  • Priority: US16504527 1927-01-31
  • Main IPC: H01J7/18
  • IPC: H01J7/18
Method of exhausting thermionic tubes and like devices
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