3903777

Information

• Patent Grant
• 3903777

• References
• Source

• Patent Number

  3,903,777

• Date Filed

  Not available

• Date Issued

  Tuesday, September 9, 1975
  49 years ago

• CPC

  • G10B3/06 - Valves Sleeves

• US Classifications

  • 084 - Music
  • 984 - Musical instruments