1830233

Information

• Patent Grant
• 1830233

• References
• Source

• Patent Number

  1,830,233

• Date Filed

  Not available

• Date Issued

  Tuesday, November 3, 1931
  93 years ago

• CPC

  • H01J19/40 - Screens for shielding
  • H01J19/38 - Control electrodes
  • H01J2893/0018 - Bar or cage-like grids

• US Classifications

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