Issued Patents 2005
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953248 | Progressive power lens | Hiroshi Sato, Moriyasu Shirayanagi | 2005-10-11 |
| 6948816 | Method of manufacturing progressive power spectacle lens | Moriyasu Shirayanagi | 2005-09-27 |