Three-dimensional mathematical game
US3995862A · kind A · utility
14Cited by
8References
11Claims
0Family size
Inventor
Key dates
| Filing date | Aug 18, 1975 |
| Grant date | Dec 7, 1976 |
| Priority date | — |
| Expiry date | Aug 18, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2003/00271
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A three-dimensional mathematical game comprises a stacked array of rotatable transparent or translucent plates, each plate being rotatable about a common vertical axis, the plates carrying indicia thereon such that when the plates are viewed through one of the top or bottom plates, there will appear to be a plurality of vertical rows of indicia. The indicia are arranged to represent a field of numbers in some numbers system to the base 2 or higher, and the game is played by rotating the plates to go from one number configuration to another.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.