Issued Patents 2017
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9771775 | Valve for a hydrocarbon well, hydrocarbon well provided with such valve and use of such valve | Derk Lucas Klompsma | 2017-09-26 |
| 9638001 | Method for producing hydrocarbon gas from a wellbore and valve assembly | Cornelis Adrianus Maria Veeken, Derk Lucas Klompsma, Ewout Biezen | 2017-05-02 |