3440475

Information

• Patent Grant
• 3440475

• References
• Source

• Patent Number

  3,440,475

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1969
  55 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
  • H01J1/20 - Cathodes heated indirectly by an electric current Cathodes heated by electron or ion bombardment

• US Classifications

  • 313 - Electric lamp and discharge devices