Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8361806 | Open channel solid phase extraction systems and methods | Douglas T. Gjerde | 2013-01-29 |
| 7879621 | Open channel solid phase extraction systems and methods | Douglas T. Gjerde | 2011-02-01 |
| 7667010 | Open channel solid phase extraction systems and methods | Douglas Gierde | 2010-02-23 |
| 7482169 | Low dead volume extraction column device | Douglas T. Gjerde | 2009-01-27 |
| 7122640 | Open channel solid phase extraction systems and methods | Douglas T. Gjerde | 2006-10-17 |