3822487

Information

• Patent Grant
• 3822487

• References
• Source

• Patent Number

  3,822,487

• Date Filed

  Not available

• Date Issued

  Tuesday, July 9, 1974
  50 years ago

• CPC

  • A63F9/0098 - Word or number games
  • G09B1/40 - to form symbols or signs by appropriate arrangement
  • G09B17/00 - Teaching reading

• US Classifications

  • 434 - Education and demonstration
  • 040 - Card, picture, or sign exhibiting
  • 446 - Amusement devices: toys
  • D18 - Printing and office machinery