Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE39343 | Plastic lenses for spectacles with high refractive indices | Tadashi Kobayashi | 2006-10-17 |
| 6183081 | Kit providing independent right and left eyeglass lenses with side frames and method for assembly thereof | Kotaro Ono, Kenji Sumida | 2001-02-06 |
| 6070979 | Plastic lenses for spectacles with high refractive indices | Tadashi Kobayashi | 2000-06-06 |
| 5709922 | Transparent article and process for producing the same | Masahiko Ono, Yoshishige Endo, Kenji Sumida | 1998-01-20 |
| 5137344 | Semi-finished lens | — | 1992-08-11 |
| 4590248 | Method for producing a plastic lens using tertiary alkyl peroxy allyl carbonate | Yasuo Moriya | 1986-05-20 |