Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6563776 | Information storage apparatus for monitoring a number of defective sectors included in a zone so as to select a substitutional area from a different zone | Toshiyuki Oi | 2003-05-13 |
| 6434106 | Optical information storage unit and laser power control method | — | 2002-08-13 |
| 6131137 | Drive control unit and optical memory apparatus | Teruji Yamakawa, Kiyomi Imamura | 2000-10-10 |
| 6088765 | Removable medium data storage apparatus, optical disk apparatus and data transfer control method | — | 2000-07-11 |
| 5829017 | Removable medium data storage with pre-reading before issuance of a first read command | — | 1998-10-27 |
| 5590096 | Rewritable storage apparatus using first and second bias magnetic fields | Teruji Yamakawa, Tetsuo Maruyama | 1996-12-31 |