Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5318302 | Magnetic puzzle | Jan Essebaggers | 1994-06-07 |
| 4898560 | Mirror pattern forming amusement device | — | 1990-02-06 |
| 4509756 | Puzzle with elements transferable between closed-loop paths | — | 1985-04-09 |
| 4479654 | Game with conveyor | — | 1984-10-30 |
| 4397463 | Ball game | — | 1983-08-09 |
| 4385763 | Pattern forming ball game | — | 1983-05-31 |