Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702610 | Sheet materials for solid phase extractions and solid phase reactions | Donald F. Hagen, Paul E. Hansen | 1997-12-30 |
| 5688370 | Sheet materials for solid phase extractions and solid phase reactions | Donald F. Hagen, Paul E. Hansen | 1997-11-18 |