3722347

Information

• Patent Grant
• 3722347

• References
• Source

• Patent Number

  3,722,347

• Date Filed

  Not available

• Date Issued

  Tuesday, March 27, 1973
  51 years ago

• CPC

  • G10B3/06 - Valves Sleeves

• US Classifications

  • 084 - Music
  • 984 - Musical instruments