2988667

Information

• Patent Grant
• 2988667

• References
• Source

• Patent Number

  2,988,667

• Date Filed

  Not available

• Date Issued

  Tuesday, June 13, 1961
  64 years ago

• CPC

  • H01J19/00 - Details of vacuum tubes of the types covered by group H01J21/00
  • H01J2893/0024 - Planar grids

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 445 - Electric lamp or space discharge component or device manufacturing
  • D26 - Lighting