2663811

Information

• Patent Grant
• 2663811

• References
• Source

• Patent Number

  2,663,811

• Date Filed

  Not available

• Date Issued

  Tuesday, December 22, 1953
  71 years ago

• CPC

  • H01J17/54 - having one or more control electrodes

• US Classifications

  • 313 - Electric lamp and discharge devices