1880499

Information

• Patent Grant
• 1880499

• References
• Source

• Patent Number

  1,880,499

• Date Filed

  Not available

• Date Issued

  Tuesday, October 4, 1932
  92 years ago

• CPC

  • H01J13/20 - Control electrodes
  • H01J2893/0092 - Anodic screens or grids

• US Classifications

  • 313 - Electric lamp and discharge devices
  • 174 - Electricity: conductors and insulators
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems