Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4890273 | Optical information recording/reproducing system with variable gain servo error correction in response to detected track formats | Toyoaki Takeuchi | 1989-12-26 |
| 4873351 | Method for preparation of antimony mercaptides | Kohtaroh Fujita, Toshio Wachi | 1989-10-10 |
| 4837757 | Optical recording/reproducing device | Hiroo Okada, Ken Ohsima | 1989-06-06 |
| 4801214 | Color filter for wind-up system color changer | — | 1989-01-31 |