Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6932474 | Progressive-power lens | Masaaki Matsushima | 2005-08-23 |
| 6871955 | Spectacle lens and manufacturing method therefor | Tetsuma Yamakaji | 2005-03-29 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6932474 | Progressive-power lens | Masaaki Matsushima | 2005-08-23 |
| 6871955 | Spectacle lens and manufacturing method therefor | Tetsuma Yamakaji | 2005-03-29 |