Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5684785 | Optical disk and method of preventing fraudulent use of optical disk rotation synchronous control system | Satoshi Itami, Kenichi Utsumi, Kazunori Naito, Satoshi Komura | 1997-11-04 |
| 5661800 | Method and manufacture for preventing unauthorized use by judging the corresponding relationship between logical and physical addresses | Kazunori Naito | 1997-08-26 |