Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5864380 | Progressive power lens | — | 1999-01-26 |
| 5805265 | Progressive lens | — | 1998-09-08 |
| 5666184 | Progressive power lens | Fumio Takahashi | 1997-09-09 |
| 5557348 | Progressive power lens | Fumio Takahashi | 1996-09-17 |
| 5523807 | Progressive multifocal lens | Yasunori Ueno, Fumio Takahashi | 1996-06-04 |
| 5510860 | Progressive multifocal lens | Yasunori Ueno, Fumio Takahashi | 1996-04-23 |
| 5506630 | Progressive multifocal lens | Yasunori Ueno, Fumio Takahashi | 1996-04-09 |