Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879144 | Liquid crystal element | Yoshiyuki Nakura | 1989-11-07 |
| 4859051 | Eye testing apparatus | Yasufumi Fukuma, Ikuo Kitao | 1989-08-22 |
| 4848895 | Automatic eye refractive power measuring apparatus | Kiwami Horiguchi, Shinji Wada, Ikuo Kitao | 1989-07-18 |
| 4841556 | Plasma X-ray source | Isao Ochiai, Yoshio Watanabe, Seiichi Murayama | 1989-06-20 |