3147447

Information

• Patent Grant
• 3147447

• References
• Source

• Patent Number

  3,147,447

• Date Filed

  Not available

• Date Issued

  Tuesday, September 1, 1964
  60 years ago

• CPC

  • H03G9/06 - for gain control and tone control

• US Classifications

  • 330 - Amplifiers
  • 084 - Music