2209955

Information

• Patent Grant
• 2209955

• References
• Source

• Patent Number

  2,209,955

• Date Filed

  Not available

• Date Issued

  Tuesday, August 6, 1940
  84 years ago

• CPC

  • H04B3/12 - in negative-feedback path of line amplifier
  • H03F1/36 - in discharge-tube amplifiers
  • H04B3/08 - in negative-feedback path of line amplifier

• US Classifications

  • 330 - Amplifiers
  • 062 - Refrigeration
  • 331 - Oscillators
  • 333 - Wave transmission lines and networks
  • 379 - Telephonic communications