2196392

Information

• Patent Grant
• 2196392

• References
• Source

• Patent Number

  2,196,392

• Date Filed

  Not available

• Date Issued

  Tuesday, April 9, 1940
  84 years ago

• CPC

  • H03B9/01 - using discharge tubes
  • H01J25/68 - Tubes specially designed to act as oscillator with positive grid and retarding field

• US Classifications

  • 331 - Oscillators
  • 313 - Electric lamp and discharge devices
  • 455 - Telecommunications