Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4848896 | Eye refractometer | — | 1989-07-18 |
| 4820037 | Apparatus for measuring the refractive power of an eye | Yoshimi Kohayakawa | 1989-04-11 |
KM
Kazuhiro Matsumoto
Overall (1989): #22,882 of 140,708Top 20%
2
Patents 1989