2247838

Information

• Patent Grant
• 2247838

• References
• Source

• Patent Number

  2,247,838

• Date Filed

  Not available

• Date Issued

  Tuesday, July 1, 1941
  83 years ago

• CPC

  • G10B3/06 - Valves Sleeves

• US Classifications

  • 084 - Music
  • 984 - Musical instruments