1791982

Information

• Patent Grant
• 1791982

• References
• Source

• Patent Number

  1,791,982

• Date Filed

  Not available

• Date Issued

  Tuesday, February 10, 1931
  94 years ago

• CPC

  • G09B13/00 - Teaching typing
  • G09B11/08 - Teaching shorthand
  • Y10T74/18528 - Rotary to intermittent unidirectional motion

• US Classifications

  • 434 - Education and demonstration
  • 040 - Card, picture, or sign exhibiting
  • 074 - Machine element or mechanism
  • 273 - Amusement devices: games