Shiftable block puzzle
US4422641A · kind A · utility
13Cited by
2References
11Claims
0Family size
Inventor
Key dates
| Filing date | Mar 18, 1982 |
| Grant date | Dec 27, 1983 |
| Priority date | — |
| Expiry date | Mar 18, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA63F2003/00848
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A shiftable block puzzle comprising a board defining a bottom wall having a flat top surface. A plurality of blocks of different sizes are confined for lateral movement on the flat surface. A restricted area is defined on the flat top surface for reception thereon of a single primary one of the blocks after shifting movements of secondary ones of the blocks to make way for displacement of the primary block from a predetermined starting position. The primary block is adapted to permit same to be displaced onto said restricted area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.