Stacked sheets with code bits forming composite image
US4781381A · kind A · utility
1Cited by
5References
3Claims
0Family size
Inventor
Key dates
| Filing date | Aug 22, 1986 |
| Grant date | Nov 1, 1988 |
| Priority date | — |
| Expiry date | Aug 22, 2006 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2250/305
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
The three-dimensional puzzle consists of a plurality of transparent sheets on which code bits of information are arranged. When viewed in the correct direction, the code bits of information define a two-dimensional picture or object. When viewed from any other direction, the code bits appear as a jumbled image, and the hidden object is not apparent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.