Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5556891 | Prepolymers containing isocyanate groups | Holger Seifert, Juergen Winkler, Regina Pretzsch | 1996-09-17 |
| 5530154 | Prepolymers containing isocyanate groups | Holger Seifert, Juergen Winkler, Regina Pretzsch | 1996-06-25 |
| 4976533 | Method for measuring the rotation of an assymetric contact lens and lenses for practicing the method | Paul Hahn, John H. Reynolds, IV, Alan Digby Tomlinson, Martin J. Drazba | 1990-12-11 |