Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5617155 | Method for determining measurement parameters for a spectacle wearer | Christian Ducarouge, Richard Grisel, Helene Sottocasa, Alain Chansavoir, Ahmed Haddadi | 1997-04-01 |