Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888225 | Resin-impregnated foam materials and methods | Timothy C. Sandvig, Dennis C. Bartizal, Anthony J. Campagna, Chris J. Libbey | 1989-12-19 |
| 4883864 | Modified collagen compound and method of preparation | — | 1989-11-28 |
| 4856502 | Curable resin coated sheets having reduced tack | Dean A. Ersfeld, Paul E. Hansen, Dennis C. Bartizal, Katherine E. Reed, Wayne K. Larson +2 more | 1989-08-15 |
| 4851513 | Viscoelastic collagen solution for opthalmic use and method of preparation | Dale P. DeVore, Robert A. Scherrer | 1989-07-25 |