Issued Patents All Time
Showing 51–58 of 58 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6218655 | Optical pickup | Sakashi Ohtaki, Kiyoshi Tateishi | 2001-04-17 |
| 6172957 | Optical pickup and multi-layer disc playback apparatus | — | 2001-01-09 |
| 6151154 | Optical pickup, aberration correction unit and astigmatism measurement method | Yoshitsugu Araki, Sakashi Ootaki, Junichi Furukawa, Kiyoshi Tateishi | 2000-11-21 |
| 6141304 | Optical pickup | — | 2000-10-31 |
| 6124988 | Objective lens | Takuma Yanagisawa, Katsuhiro Koike | 2000-09-26 |
| 6125088 | Aberration correcting apparatus and information recording medium play-back apparatus | — | 2000-09-26 |
| 6078554 | Wave-front aberration compensation unit, wave-front aberration compensation device, and optical pickup | Sakashi Ootaki, Masayuki Iwasaki | 2000-06-20 |
| 5999503 | Focus control apparatus in multi-layered disk reading apparatus utilizing acceleration, deceleration and focus error signals to switch between layers of the disk | Kiyoshi Tateishi | 1999-12-07 |