2250522

Information

• Patent Grant
• 2250522

• References
• Source

• Patent Number

  2,250,522

• Date Filed

  Not available

• Date Issued

  Tuesday, July 29, 1941
  83 years ago

• CPC

  • G10C3/30 - Couplers
  • G10F3/00 - Independent players for keyboard instruments

• US Classifications

  • 084 - Music
  • 984 - Musical instruments