Issued Patents 2003
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6652097 | Progressive-power spectacle lens | — | 2003-11-25 |
| 6631988 | Designing and manufacturing methods of spectacle lens, and spectacle lens series | Yoshimi Obara | 2003-10-14 |
| 6554426 | Methods for designing and manufacturing single-vision spectacle lens and manufacturing system thereof | — | 2003-04-29 |