Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6260966 | Multifocal ocular lens | Tadashi Sawano, Hiroyuki Ohyama, Kazuya Miyamura, Hideaki Kondou | 2001-07-17 |
| 6158861 | Prism ballast type contact lens, method of producing the same, and mold assembly used in producing the lens | Hiroyuki Oyama | 2000-12-12 |
| 6142625 | Toric multifocal lens having different astigmatism corrective optical powers in respective vision correction regions, and method of producing the same | Tadashi Sawano, Hiroyuki Oyama, Hideaki Kondou | 2000-11-07 |
| 6030077 | Multifocal ocular lens having intermediate region with continuously varying optical power | Tadashi Sawano, Hiroyuki Ohyama, Kazuya Miyamura | 2000-02-29 |