3177288

Information

• Patent Grant
• 3177288

• References
• Source

• Patent Number

  3,177,288

• Date Filed

  Not available

• Date Issued

  Tuesday, April 6, 1965
  59 years ago

• CPC

  • H04R23/004 - using ionised gas

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 331 - Oscillators
  • 332 - Modulators