Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9663336 | Chain and cable handling winch system and a method for changing a chain wheel | Joop Roodenburg, Gijsbert SCHOUTEN | 2017-05-30 |
| 8973901 | Double drum traction winch | Joop Roodenburg | 2015-03-10 |