Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6306309 | Method for cleaning sand in a sand bed | Klas Lange | 2001-10-23 |
| 6228256 | Apparatus for cleaning a pool bottom having a sand bed | Klas Lange | 2001-05-08 |
| 6115864 | Apparatus for cleaning a water-filled pool | Marcus Davidsson, Klas Lange | 2000-09-12 |