Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5702819 | Composite lenses | Amitava Gupta, Venkatramani S. Iyer, Paul J. Nagg | 1997-12-30 |
| 5598234 | Method of manufacturing toric single vision, spherical or aspheric bifocal, multifocal or progressive contact lenses | Amitava Gupta | 1997-01-28 |