1391986

Information

• Patent Grant
• 1391986

• References
• Source

• Patent Number

  1,391,986

• Date Filed

  Not available

• Date Issued

  Tuesday, September 27, 1921
  103 years ago

• CPC

  • G09B1/20 - and bearing the symbols on a surface parallel to the axis of rotation

• US Classifications

  • 434 - Education and demonstration
  • 273 - Amusement devices: games
  • D19 - Office supplies