Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4858220 | Laser control circuit for optical data recording/reproduction apparatus | — | 1989-08-15 |
| 4769801 | Focus servo control device for optical disks having servo offset error elimination | Masanori Doi | 1988-09-06 |
| 4730294 | Optical information-recording/reproducing apparatus with cancellation for offset contained in error signal | — | 1988-03-08 |
| 4706232 | Optical recording and reproducing apparatus | Yoshiro Yoda, Shoji Yoshikawa, Masanori Doi, Kazutake Sugawara | 1987-11-10 |
| 4651314 | Optical recording and reproducing equipment | Shoji Yoshikawa | 1987-03-17 |