2388505

Information

• Patent Grant
• 2388505

• References
• Source

• Patent Number

  2,388,505

• Date Filed

  Not available

• Date Issued

  Tuesday, November 6, 1945
  78 years ago

• CPC

  • H03G9/06 - for gain control and tone control

• US Classifications

  • 381 - Electrical audio signal processing systems and devices