Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7649825 | Splitting element, light emitter, and optical pickup apparatus | Kazuhiro Tsuchida, Toshiya Nagahama, Keiji Sakai, Tetsuo Ueyama, Katsushige Masui | 2010-01-19 |
| 7106682 | Optical pickup | Tetsuo Ueyama, Keiji Sakai, Yukio Kurata, Katsushige Masui, Renzaburo Miki +2 more | 2006-09-12 |
| 6868055 | Optical pickup | Tetsuo Ueyama, Keiji Sakai, Yukio Kurata, Katsushige Masui, Renzaburo Miki +2 more | 2005-03-15 |