2021692

Information

• Patent Grant
• 2021692

• References
• Source

• Patent Number

  2,021,692

• Date Filed

  Not available

• Date Issued

  Tuesday, November 19, 1935
  89 years ago

• CPC

  • H03D7/06 - by means of discharge tubes having more than two electrodes

• US Classifications

  • 455 - Telecommunications
  • 331 - Oscillators