Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5272329 | Optical pickup device using a holographic optical element and an amplifier | Toshiya Nagahama, Shigehiro Yamada, Naruichi Yokogawa, Yasushi Seike | 1993-12-21 |
| 5049733 | Semiconductor chip detecting device for providing focusing and reproduction signals | Hikaru Nishihara, Taizo Yokota | 1991-09-17 |
| 5007713 | Beam converting apparatus with a parallel light beam input and output from one prism plane | Taizo Yokota | 1991-04-16 |