Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7275584 | Immersion nozzle for continuous casting of steel and continuous steel casting method using same | Katsumi Morikawa, Joki Yoshitomi, Keisuke Asano | 2007-10-02 |
| 5844660 | Objectives refraction measuring apparatus | Yasuo Kato, Kunihiko Hara | 1998-12-01 |
| 5844661 | Ophthalmic apparatus | Yasuo Kato, Takeshi Nakamura | 1998-12-01 |