3117249

Information

• Patent Grant
• 3117249

• References
• Source

• Patent Number

  3,117,249

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1964
  61 years ago

• CPC

  • H01J1/24 - Insulating layer or body located between heater and emissive material

• US Classifications

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