Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888585 | Information signal transmitting device | Norikazu Kamiya | 1989-12-19 |
| 4875211 | Galois field arithmetic logic unit | Makoto Usui | 1989-10-17 |
| 4873679 | Optical information recording disk and optical information recording disk apparatus | Makoto Usui | 1989-10-10 |
| 4866717 | Code error detecting and correcting apparatus | Makoto Usui, Isao Satoh | 1989-09-12 |
| 4821253 | Optical disk and optical disk apparatus with error correction | Makoto Usui, Isao Satoh | 1989-04-11 |