Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6953248 | Progressive power lens | Hiroshi Sato, Chikara Yamamoto | 2005-10-11 |
| 6948816 | Method of manufacturing progressive power spectacle lens | Chikara Yamamoto | 2005-09-27 |
| 6857742 | Manufacturing method and supplying method of spectacle lenses | Yoshimi Obara | 2005-02-22 |