Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6844045 | Method for making optical information medium and optical information medium | Hideki Hirata, Tomoki Ushida, Mamoru Usami | 2005-01-18 |
| 6822937 | Optical information medium | Takuya Tsukagoshi, Yoichi Nakayama | 2004-11-23 |
| 6775838 | Optical information medium and its testing method | Naoki Hayashida, Hideki Hirata | 2004-08-10 |
| 6731591 | Optical information medium | Naoki Hayashida | 2004-05-04 |
| 6689415 | Method and apparatus for preparing optical information medium | Hideki Hirata, Kenji Yamaga | 2004-02-10 |
| 6680899 | Optical information medium | Hideki Hirata, Naoki Hayashida, Toshifumi Tanaka | 2004-01-20 |
| 6667952 | Optical storage medium having a specific light transmitting layer for small laser beam and high linear velocity | Hideki Hirata, Tatsuya Kato | 2003-12-23 |
| 6600717 | Optical information medium | Naoki Hayashida, Hideki Hirata | 2003-07-29 |
| 6590856 | Optical information medium | Takuya Tsukagoshi, Hideki Hirata, Naoki Hayashida | 2003-07-08 |
| 6576319 | Optical information medium and making method | Jiro Yoshinari, Takuya Tsukagoshi | 2003-06-10 |
| 6437017 | Coating composition and optical recording medium | — | 2002-08-20 |
| 6383596 | Optical recording medium and process for producing the same | Hiroyuki Arioka, Megumi Yoshimura | 2002-05-07 |
| 6087067 | Optical recording medium | Tatsuya Kato, Hajime Utsunomiya, Hideki Hirata | 2000-07-11 |
| 5604005 | Magneto-optical disc | Hiroyuki Endo, Hideki Hirata, Isamu Kuribayashi | 1997-02-18 |
| 5578355 | Magneto-optical disk having a microporous protective coating containing a lubricant | Hideki Hirata, Hiroyuki Endo, Isamu Kuribayashi | 1996-11-26 |
| 5568466 | Magneto-optical disc | Hiroyuki Endo, Hideki Hirata, Isamu Kuribayashi | 1996-10-22 |