3420131

Information

• Patent Grant
• 3420131

• References
• Source

• Patent Number

  3,420,131

• Date Filed

  Not available

• Date Issued

  Tuesday, January 7, 1969
  56 years ago

• CPC

  • G10B3/10 - Actions
  • G10H1/34 - Switch arrangements

• US Classifications

  • 084 - Music
  • 984 - Musical instruments