Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5631720 | Ophthalmic lenses with heterocyclic chromene compounds | Robert Guglielmetti, Andre Samat | 1997-05-20 |
| 5604280 | Ring spiro [fluorene-[2H]-benzopyranes] and their use in ophthalmic optics | Robert Guglielmetti, Andr e Samat, Vladimir Lokshin, Guena elle Harie | 1997-02-18 |