2143397

Information

• Patent Grant
• 2143397

• References
• Source

• Patent Number

  2,143,397

• Date Filed

  Not available

• Date Issued

  Tuesday, January 10, 1939
  85 years ago

• CPC

  • H03K4/18 - using a single tube exhibiting negative resistance between two of its electrodes

• US Classifications

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