Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6728198 | Optical information medium and recording method therefor | Toru Fujii, Toshiaki Tajima, Yuji Tomizawa, Emiko Hamada | 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, Emiko Hamada | 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, Emiko Hamada | 2004-03-23 |
| 6493312 | Optical information medium | Toshiaki Tajima, Toru Fujii, Emiko Hamada | 2002-12-10 |
| 6480450 | Method and apparatus for recording optical information by varying recording pulse width | Toru Fujii, Masahiko Hirano | 2002-11-12 |
| 6452899 | Optical information medium and recording method therefor | Toru Fujii, Toshiaki Tajima, Yuji Tomizawa, Emiko Hamada | 2002-09-17 |
| 5895697 | Optical information medium | Toshiaki Tajima, Yuji Tomizawa, Emiko Hamada, Toru Fujii | 1999-04-20 |