Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4744648 | Eye refractive power measuring apparatus | Yasuo Kato, Yasufumi Fukuma, Kiwami Horiguchi | 1988-05-17 |
| 4712895 | Ocular position measuring apparatus | Yasuo Kato | 1987-12-15 |
| 4371237 | Apparatus for measuring curvatures of a spherical surface | Yoshinori Oana | 1983-02-01 |
| 4367019 | Image rotating means for eye refractometers | Ikuo Kitao | 1983-01-04 |