Issued Patents 2002
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6493312 | Optical information medium | Ryou Negishi, Toshiaki Tajima, Toru Fujii | 2002-12-10 |
| 6452899 | Optical information medium and recording method therefor | Toru Fujii, Toshiaki Tajima, Yuji Tomizawa, Ryou Negishi | 2002-09-17 |
| 6445676 | Optical information medium | Toru Fujii, Yuji Tomizawa | 2002-09-03 |
| 6346364 | Optical information recording medium and recording method | Yuji Arai, Yosikazu Takagisi, Takashi Ishiguro | 2002-02-12 |