2222668

Information

• Patent Grant
• 2222668

• References
• Source

• Patent Number

  2,222,668

• Date Filed

  Not available

• Date Issued

  Tuesday, November 26, 1940
  84 years ago

• CPC

  • H04B10/50 - Transmitters
  • H01J63/00 - Cathode-ray or electron-stream lamps
  • H01J2893/0031 - Tubes with material luminescing under electron bombardment

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 252 - Compositions