Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7969834 | Optical pickup device having a structure providing efficient light usage | Shinichi Hamaguchi, Naoki Nakanishi, Naoto Shimada | 2011-06-28 |
| 7539117 | Optical pickup | Masayuki Ono, Naoki Nakanishi, Masahiko Nishimoto | 2009-05-26 |
| 7313061 | Optical pickup having a plurality of photodetectors divided into four regions used to obtain both focus and tracking error signals | Masahiko Nishimoto, Shinichi Hamaguchi, Yasuyuki Kochi | 2007-12-25 |
| 7247826 | Optical pickup apparatus | Shinichi Hamaguchi, Naoki Nakanishi, Naoto Shimada | 2007-07-24 |