Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4839879 | Method for recording data on non-defective sectors of an optical disk | Kaname Sawada, Kazuo Suzuki, Shinji Hasunuma, Motoyasu Ohno, Tsukasa Kanazawa +1 more | 1989-06-13 |