3856309

Information

• Patent Grant
• 3856309

• References
• Source

• Patent Number

  3,856,309

• Date Filed

  Not available

• Date Issued

  Tuesday, December 24, 1974
  49 years ago

• CPC

  • A63F3/00697 - Playing pieces
  • A63F2003/025 - for teaching chess

• US Classifications

  • 273 - Amusement devices: games