2105558

Information

• Patent Grant
• 2105558

• References
• Source

• Patent Number

  2,105,558

• Date Filed

  Not available

• Date Issued

  Tuesday, January 18, 1938
  87 years ago

• CPC

  • H03G9/10 - for tone control and volume expansion or compression

• US Classifications

  • 330 - Amplifiers
  • 327 - Miscellaneous active electrical nonlinear devices, circuits, and systems
  • 455 - Telecommunications