Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6577564 | Optical pickup device | Tadashi Takeda, Hisahiro Ishihara, Yoshio Hayashi, Yuichi Takei | 2003-06-10 |
| 6445671 | Optical pickup device having a shielding protection | Tadashi Takeda, Hisahiro Ishihara, Yoshio Hayashi, Yuichi Takei | 2002-09-03 |
| 6438075 | Light-pick-up device and light source unit incorporated in the same | Tadashi Takeda, Yoshio Hayashi | 2002-08-20 |