Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6425665 | Visual acuity examination apparatus | Yuichiro Kanazawa, Noritsugu Nozawa | 2002-07-30 |
| 6406147 | Visual acuity testing apparatus | Yuichiro Kanazawa, Noritsugu Nozawa | 2002-06-18 |