3805665

Information

• Patent Grant
• 3805665

• References
• Source

• Patent Number

  3,805,665

• Date Filed

  Not available

• Date Issued

  Tuesday, April 23, 1974
  50 years ago

• CPC

  • G10D7/023 - Recorders

• US Classifications

  • 084 - Music
  • 984 - Musical instruments