Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8154979 | Objective lens and optical pickup apparatus | — | 2012-04-10 |
| 7803455 | Optical element and optical pickup apparatus | Tatsuo Ohta, Katsuya Nakamura | 2010-09-28 |
| 7602679 | Optical lens and information recording and reproducing device | Tatsuo Ohta | 2009-10-13 |
| 7599119 | Antireflection coating, optical element, and optical transceiver module | Katsuya Nakamura, Tatsuo Ohta, Setsuo Tokuhiro, Shingo Nakamura | 2009-10-06 |