2239416

Information

• Patent Grant
• 2239416

• References
• Source

• Patent Number

  2,239,416

• Date Filed

  Not available

• Date Issued

  Tuesday, April 22, 1941
  83 years ago

• CPC

  • H01J3/02 - Electron guns
  • H01J1/20 - Cathodes heated indirectly by an electric current Cathodes heated by electron or ion bombardment
  • H01J3/024 - Electron guns using thermionic emission of cathode heated by electron or ion bombardment or by irradiation by other energetic beams
  • H01J35/14 - Arrangements for concentrating, focusing, or directing the cathode ray

• US Classifications

  • 313 - Electric lamp and discharge devices