Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839109 | Process for producing a contact lens | Minoru Kumakura, Hidenari Suyama, Nobuo Kameda, Hideo Koyama | 1989-06-13 |
| 4800085 | Slow-release composite and process for producing the same | Masaru Yoshida, Masaharu Asano, Katsuyuki Nakai, Hidetoshi Yamanaka, Keizo Shida +1 more | 1989-01-24 |