3866920

Information

• Patent Grant
• 3866920

• References
• Source

• Patent Number

  3,866,920

• Date Filed

  Not available

• Date Issued

  Tuesday, February 18, 1975
  50 years ago

• CPC

  • A63F3/00697 - Playing pieces
  • A63F9/12 - Three-dimensional jig-saw puzzles
  • A63F2003/00646 - with illumination of playing field or playing piece
  • A63F2003/0069 - using a spring
  • A63F2250/42 - with a light-sensitive substance

• US Classifications

  • 273 - Amusement devices: games