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Invention Grant
US1114697A Electron-discharge apparatus. 失效
电子放电设备

  • Patent Title: Electron-discharge apparatus.
  • Patent Title (中): 电子放电设备
  • Application No.: US1913809249
    Application Date: 1913-12-29
  • Publication No.: US1114697A
    Publication Date: 1914-10-20
  • Inventor: HULL ALBERT W
  • Applicant: GEN ELECTRIC
  • Assignee: Gen Electric
  • Current Assignee: Gen Electric
  • Priority: US1913809249 1913-12-29
Electron-discharge apparatus.
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