2289972

Information

• Patent Grant
• 2289972

• References
• Source

• Patent Number

  2,289,972

• Date Filed

  Not available

• Date Issued

  Tuesday, July 14, 1942
  81 years ago

• CPC

  • H01J17/38 - Cold-cathode tubes
  • H01J2893/0065 - Electrode systems

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 445 - Electric lamp or space discharge component or device manufacturing