2171980

Information

• Patent Grant
• 2171980

• References
• Source

• Patent Number

  2,171,980

• Date Filed

  Not available

• Date Issued

  Tuesday, September 5, 1939
  85 years ago

• CPC

  • H01J25/72 - in which a standing wave or a considerable part thereof is produced along an electrode
  • H01J25/00 - Transit-time tubes

• US Classifications

  • 315 - Electric lamp and discharge devices: systems
  • 313 - Electric lamp and discharge devices
  • 331 - Oscillators
  • 343 - Communications: radio wave antennas