Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9944961 | Process for removing sulphide from an aqueous solution | Erik VAN ZESSEN, Sjoerd Hubertus Jozef Vellinga, Hendrik Dijkman | 2018-04-17 |
| 8728318 | Settling device, purifier comprising a settling device and methods for anaerobic or aerobic purification of waste water | Sjoerd Hubertus Jozef Vellinga | 2014-05-20 |
| 8066878 | Anaerobic purification device | Sjoerd Hubertus Jozef Vellinga, Jelle Hendrik de Boer, Leonard Hubertus Alphonsus Habets | 2011-11-29 |