2342822

Information

• Patent Grant
• 2342822

• References
• Source

• Patent Number

  2,342,822

• Date Filed

  Not available

• Date Issued

  Tuesday, February 29, 1944
  80 years ago

• CPC

  • H04B1/1623 - using tubes
  • H03F1/36 - in discharge-tube amplifiers
  • H03G3/08 - incorporating negative feedback
  • H04R25/00 - Deaf-aid sets providing an auditory perception; Electric tinnitus maskers providing an auditory perception

• US Classifications

  • 381 - Electrical audio signal processing systems and devices
  • 330 - Amplifiers