Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6753278 | Optical glasses and their uses | Ute Woelfel, Ulrich Siepe | 2004-06-22 |
| 6716781 | Lead-free optical glasses | Peter Brix, Ute Woelfel | 2004-04-06 |
| 6709998 | Lead-free optical heavy flint glasses | Ute Woelfel | 2004-03-23 |