Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4540253 | Method and device for measuring eye refraction errors | Shuji Hoshika, Hideyuki Ishiai, Yukiyasu Nishikawa, Masato Hara, Hirochika Aiura +1 more | 1985-09-10 |
| 4486080 | Device for detecting blinking of an eye under examination | Kiyoshi Itoh, Yukiyasu Nishikawa, Shuji Hoshika, Masato Hara, Hideyuki Ishiai +1 more | 1984-12-04 |
| 4432617 | Eye refractive error measuring device | Kiyoshi Itoh, Yukiyasu Nishikawa, Shuji Hoshika | 1984-02-21 |
| 4410267 | Hand-held lens meter | Osamu Shindow, Takeshi Machida, Hiroshi Koyama | 1983-10-18 |