Issued Patents 2002
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6452899 | Optical information medium and recording method therefor | Toru Fujii, Toshiaki Tajima, Ryou Negishi, Emiko Hamada | 2002-09-17 |
| 6445676 | Optical information medium | Toru Fujii, Emiko Hamada | 2002-09-03 |