Issued Patents 2004
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6728198 | Optical information medium and recording method therefor | Toru Fujii, Toshiaki Tajima, Yuji Tomizawa, Ryou Negishi | 2004-04-27 |
| 6721265 | High-density optical information recording medium and a substrate and a stamper for the manufacture thereof | Toru Fujii, Toshiaki Tajima, Yuji Tomizawa, Ryou Negishi | 2004-04-13 |
| 6711118 | Optical information recording medium for recording optically reproducible signals thereon through the use of a recording laser beam and method for recording optical information thereon | Toshiaki Tajima, Toru Fujii, Yuji Tomizawa, Ryou Negishi | 2004-03-23 |