2806399

Information

• Patent Grant
• 2806399

• References
• Source

• Patent Number

  2,806,399

• Date Filed

  Not available

• Date Issued

  Tuesday, September 17, 1957
  67 years ago

• CPC

  • G10D9/046 - with continuous change of tonal pitch

• US Classifications

  • 084 - Music
  • 984 - Musical instruments
  • D17 - Musical instruments