Issued Patents All Time
Showing 1–25 of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7194751 | Optical information medium | Toru Fujii, Yuji Tomizawa | 2007-03-20 |
| 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 |
| 6507547 | Medium and method for recording optical information | Yoshikazu Takagishi, Takanori Yoshizawa, Kazuyuki Shibuya | 2003-01-14 |
| 6504815 | Optical information medium, stamper for manufacturing transparent substrate therefor and recording method therefor | Toru Fujii | 2003-01-07 |
| 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 |
| 6291045 | Optical information recording medium | Toshiaki Tajima, Toru Fujii, Yuji Tomizawa | 2001-09-18 |
| 6287662 | Optical data recording medium | Yoshikazu Takagishi, Takanobu Matsumoto, Yuaki Shin | 2001-09-11 |
| 6168844 | Optical information recording medium | Yoshikazu Takagishi, Takanori Yoshizawa | 2001-01-02 |
| 6156482 | Optical information recording medium and recording method | Yuji Arai, Yosikazu Takagisi, Takashi Ishiguro | 2000-12-05 |
| 5976658 | Optical information recording medium | Yuji Tomizawa, Toru Fujii | 1999-11-02 |
| 5895697 | Optical information medium | Toshiaki Tajima, Yuji Tomizawa, Ryou Negishi, Toru Fujii | 1999-04-20 |
| 5498509 | Method of making an optical information recording substrate | Yuaki Shin, Takashi Ishiguro, Keiichi Kagawa | 1996-03-12 |
| 5407719 | Optical information recording medium and recording method | Yuji Arai, Yosikazu Takagisi, Takashi Ishiguro | 1995-04-18 |
| 5398231 | Optical information recording substrate and method of making thereof | Yuaki Shin, Takashi Ishiguro, Keiichi Kagawa | 1995-03-14 |
| 5318882 | Optical recording medium containing a light stabilizer comprised of aryl nitrogen compound | Kunihiko Ootaguro, Yosikazu Takagisi, Toru Fujii | 1994-06-07 |
| 5213955 | Optical information recording medium and recording method | Yuji Arai, Yosikazu Takagisi, Takashi Ishiguro | 1993-05-25 |
| 5155723 | Optical information recording method and medium | Yuji Arai, Yuaki Shin, Takashi Ishiguro | 1992-10-13 |
| 5090009 | Optical information recording medium | Yuji Arai, Yuaki Shin, Takashi Ishiguro | 1992-02-18 |
| 5080946 | Optical information recording medium and recording method | Yosikazu Takagisi, Kunihiko Ootaguro, Toru Fujii | 1992-01-14 |
| 5009818 | Method of manufacturing an optical information recorded disc | Yuji Arai, Yuaki Shin, Takashi Ishiguro | 1991-04-23 |