Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6251275 | Membrane filtration module and membrane filtration system | — | 2001-06-26 |
| 6186342 | Semipermeable capillary having overlapped strengthening layer | — | 2001-02-13 |
| 5833854 | Semipermeable composite membrane and a method for the preparation of such a membrane | Arie Zwijnenburg, Jan de Rijk | 1998-11-10 |
| 5494577 | Membrane bioreactor with gas lift system | — | 1996-02-27 |
| 5382210 | Dynamically balanced rowing simulator | — | 1995-01-17 |
| 5122273 | Hydrophilic membrane, process for producing a hydrophilic membrane | Gerrit Snijders, Arie Zwijnenburg, Dirk C. Weyenberg | 1992-06-16 |