3223879

Information

• Patent Grant
• 3223879

• References
• Source

• Patent Number

  3,223,879

• Date Filed

  Not available

• Date Issued

  Tuesday, December 14, 1965
  59 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
  • 140 - Wireworking