Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6808263 | Progressive spectacle lens producing only slight dynamic distortion | Andrea Welk, Peter Baumbach, Walter Haimerl, Herbert Pfeiffer, Gregor Esser +1 more | 2004-10-26 |
| 6779889 | Progressive spectacle lens exhibiting only slight dynamic change of the properties of use during a horizontal viewing movements | Andrea Welk, Peter Baumbach, Walter Haimerl, Herbert Pfeiffer, Gregor Esser +2 more | 2004-08-24 |
| 6776487 | Progressive spectacle lens having only a small change of binocular properties during a movement of glance | Walter Haimerl, Herbert Pfeiffer, Gregor Esser, Helmut Altheimer, Andrea Welk +1 more | 2004-08-17 |