Issued Patents All Time
Showing 51–54 of 54 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5452284 | Optical recording/reproducing medium and apparatus using land and groove encoded information signals and identification signals including position information | Yasuhiro Gotoh | 1995-09-19 |
| 5448551 | Optical information recording media and optical information read/write device | Eiji Ohno, Kenichi Nishiuchi | 1995-09-05 |
| 5293367 | Optical pickup head wherein an error signal is produced by detecting a phase difference in diffraction beams from a holographic optical element | Shinichi Kadowaki, Yoshiaki Komma | 1994-03-08 |
| 5235581 | Optical recording/reproducing apparatus for optical disks with various disk substrate thicknesses | Yasuhiro Gotoh | 1993-08-10 |