3692312

Information

• Patent Grant
• 3692312

• References
• Source

• Patent Number

  3,692,312

• Date Filed

  Not available

• Date Issued

  Tuesday, September 19, 1972
  52 years ago

• CPC

  • A63F9/10 - Two-dimensional jig-saw puzzles
  • A63F2009/0633 - Fresnel lenses
  • A63F2250/285 - Photographs
  • A63F2250/307 - stereoscopic

• US Classifications

  • 273 - Amusement devices: games
  • 359 - Optical: systems and elements