Issued Patents All Time
Showing 26–28 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6868902 | Multipurpose reeled tubing assembly | Joop Roodenburg | 2005-03-22 |
| 6729804 | Cantilevered tower for jack-up platform | Joop Roodenburg, Robert van Kuilenburg | 2004-05-04 |
| 6465960 | Capped electric lamp and low-pressure mercury-vapor discharge lamp | Frank Gerardus Cornelis De Bot, Antonius J. Spaapen | 2002-10-15 |