Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7236447 | Optical disk, method of playing optical disk, and optical disk drive | Tamotsu Iida, Toshinori Sugiyama, Reiji Tamura, Hideki Nagano, Yuji Yamazaki | 2007-06-26 |
| 5766407 | Optical disk producing apparatus | Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima | 1998-06-16 |
| 5688574 | Optical recording medium | Reiji Tamura, Yoshihiro Ikari, Norio Ota | 1997-11-18 |
| 5582677 | Optical disk producing apparatus | Hiroaki Miwa, Ryoichi Sudo, Tetsuo Tajima | 1996-12-10 |
| 5043965 | Optical apparatus for optical information recording medium | Tamotsu Iida, Hiroshi Nagate, Toyoyuki Nunomura, Atsuki Hirose | 1991-08-27 |
| 5040165 | Optical information recording medium and method of fabricating the same | Hiroshi Nagate, Toyoyuki Nunomura | 1991-08-13 |
| 4953152 | Mastering machine for making an on-land recording master disk with two beam alignment servo loops | Masaru Ito, Hitoshi Watanabe, Yoshito Tsunoda | 1990-08-28 |