Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834957 | Progressive spectacle lens having a genuine short progression area | Andrea Welk, Peter Baumbach, Gregor Esser, Helmut Altheimer, Edda Wehner +3 more | 2004-12-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6834957 | Progressive spectacle lens having a genuine short progression area | Andrea Welk, Peter Baumbach, Gregor Esser, Helmut Altheimer, Edda Wehner +3 more | 2004-12-28 |