455069

Information

• Patent Grant
• 455069

• References
• Source

• Patent Number

  455,069

• Date Filed

  Not available

• Date Issued

  Tuesday, June 30, 1891
  133 years ago

• CPC

  • H01J3/024 - Electron guns using thermionic emission of cathode heated by electron or ion bombardment or by irradiation by other energetic beams

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 315 - Electric lamp and discharge devices: systems