Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5340746 | Composite reactive articles for the determination of cyanide | Donald F. Hagen, Louis C. Haddad, Robert E. Perkins | 1994-08-23 |
| 5328758 | Particle-loaded nonwoven fibrous article for separations and purifications | Donald F. Hagen, Paul E. Hansen, Nicholas R. Baumann | 1994-07-12 |
| 5279742 | Solid phase extraction medium | Donald F. Hagen, James D. Luedtke | 1994-01-18 |