Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7702705 | Random number generation circuit | — | 2010-04-20 |
| 7357508 | Eye test chart apparatus | — | 2008-04-15 |
| 5710436 | Quantum effect device | Tetsufumi Tanamoto, Riichi Katoh, Li Zhang, Tadashi Sakai, Shigeki Takahashi | 1998-01-20 |
| 5644156 | Porous silicon photo-device capable of photoelectric conversion | Tadashi Sakai, Li Zhang, Taijun Murakami | 1997-07-01 |
| 5628796 | Intraocular lens | — | 1997-05-13 |
| 5440085 | Lever switch assembly | Kazumi Honjo | 1995-08-08 |