2113395

Information

• Patent Grant
• 2113395

• References
• Source

• Patent Number

  2,113,395

• Date Filed

  Not available

• Date Issued

  Tuesday, April 5, 1938
  87 years ago

• CPC

  • H03G9/10 - for tone control and volume expansion or compression
  • H03G5/26 - having discharge tubes

• US Classifications

  • 455 - Telecommunications
  • 313 - Electric lamp and discharge devices
  • 330 - Amplifiers