Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11633766 | Cleaning apparatus, system and method | Gijsbert Hendrik Klein, Berthold Schaap, Joost Kasbergen, Robbert Vijlbrief | 2023-04-25 |
| D666306 | Manhole cover | Thomas D Chapman | 2012-08-28 |
| D660455 | Manhole cover | Thomas D Chapman | 2012-05-22 |