3683229

Information

• Patent Grant
• 3683229

• References
• Source

• Patent Number

  3,683,229

• Date Filed

  Not available

• Date Issued

  Tuesday, August 8, 1972
  52 years ago

• CPC

  • H01J19/38 - Control electrodes
  • H01J2893/0017 - Cylindrical, helical or annular grids

• US Classifications

  • 313 - Electric lamp and discharge devices