Issued Patents 1997
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5703143 | Ocular lens material | Haruyuki Hiratani, Kazuhiko Nakada, Toshio Yamazaki | 1997-12-30 |
| 5703159 | Modification of resins with isocyanatosiloxanes | Toshio Yamazaki, Akira Yamamoto | 1997-12-30 |
| 5670594 | Low water-absorptive ocular lens material, low water-absorptive ocular lens shaped product made thereof, low water-absorptive ocular lens made thereof and process for its production | Kazuhiko Nakada, Noriko Yoshimatsu, Toshio Yamazaki | 1997-09-23 |
| 5605942 | Contact lens material | Haruyuki Hiratani, Kazuhiko Nakada, Toshio Yamazaki, Hideto Kato | 1997-02-25 |