Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4637720 | Lens meter having a focusing indication system with divided-image registration focusing | Moriyasu Shirayanagi, Osamu Shindo, Tadao Hara | 1987-01-20 |
| 4540253 | Method and device for measuring eye refraction errors | Shuji Hoshika, Hideyuki Ishiai, Yukiyasu Nishikawa, Masato Hara, Ikuzo Okamoto +1 more | 1985-09-10 |