3908506

Information

• Patent Grant
• 3908506

• References
• Source

• Patent Number

  3,908,506

• Date Filed

  Not available

• Date Issued

  Tuesday, September 30, 1975
  49 years ago

• CPC

  • G09B15/007 - using disc-shaped boards
  • G10G1/02 - Chord or note indicators, fixed or adjustable, for keyboard of fingerboards

• US Classifications

  • 084 - Music
  • 984 - Musical instruments
  • D18 - Printing and office machinery