3570144

Information

• Patent Grant
• 3570144

• References
• Source

• Patent Number

  3,570,144

• Date Filed

  Not available

• Date Issued

  Tuesday, March 16, 1971
  53 years ago

• CPC

  • A63F9/10 - Two-dimensional jig-saw puzzles
  • G09B23/38 - for botany

• US Classifications

  • 434 - Education and demonstration
  • 273 - Amusement devices: games