1639805

Information

• Patent Grant
• 1639805

• References
• Source

• Patent Number

  1,639,805

• Date Filed

  Not available

• Date Issued

  Tuesday, August 23, 1927
  98 years ago

• CPC

  • H01J19/28 - Non-electron-emitting electrodes Screens
  • H01J2893/0011 - Non-emitting electrodes

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices
  • 329 - Demodulators