Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8437243 | Optical information recording medium | Hideharu Tajima, Atsushi Etoh, Hiroaki Ashiwa, Ryo KOJIMA, Masahito Konishi | 2013-05-07 |
| 8105673 | Sputtering target for optical media, method of manufacturing same, optical medium, and method of manufacturing same | Yukio Kawaguchi | 2012-01-31 |
| 8105674 | Sputtering target for making optical medium, method of making same, optical medium, and method of making same | Yukio Kawaguchi, Hiroshi Takasaki | 2012-01-31 |
| 7236440 | Optical recording medium | Tetsuro Mizushima, Jiro Yoshinari, Masaki Aoshima, Koji Mishima | 2007-06-26 |
| 6898174 | Optical recording medium | Masanori Shibahara, Hajime Utsunomiya, Toshiki Aoi | 2005-05-24 |
| 6496462 | Optical recording method, optical recording apparatus, and optical recording medium | Hajime Utsunomiya, Masanori Shibahara, Toshiki Aoi | 2002-12-17 |
| 6456576 | Optical recording method | Naoki Hayashida | 2002-09-24 |
| 6438085 | Optical recording method | Tatsuya Kato, Hajime Utsunomiya, Takashi Kikukawa | 2002-08-20 |
| 6406772 | Optical recording medium and method for making | Junji Tominaga, Makoto Takahashi, Takashi Kikukawa | 2002-06-18 |
| 6249509 | Optical device with protective cover | Hideki Hirata, Hajime Utsunomiya, Hiroshi Tanabe | 2001-06-19 |
| 6242157 | Optical recording medium and method for making | Junji Tominaga, Makoto Takahashi, Takashi Kikukawa | 2001-06-05 |
| 6153355 | Optical recording medium and method for preparing the same | Makoto Takahashi, Takashi Kikukawa | 2000-11-28 |
| 6091503 | Method for determining mechanical property of resin discs and optical discs | Hideki Hirata | 2000-07-18 |
| 5936934 | Optical disc having substrates with a specified thickness/diameter ratio and an adhesive layer with a specified Young's modulus range and mechanical dissipation factor range | Hideki Hirata, Akira Itoga | 1999-08-10 |
| 5906874 | Optical recording medium, and its fabrication method | Makoto Takahashi, Takashi Kikukawa, Junji Tominaga | 1999-05-25 |
| 5891542 | Optical recording material, and optical recording medium | Junji Tominaga, Takashi Kikukawa, Makoto Takahashi | 1999-04-06 |
| 5710746 | Magneto-optical recording medium and reading method with magnetic layers of different coercivity | Kenji Uchiyama, Hajime Utsunomiya, Masanori Kosuda, Hiroyasu Inoue | 1998-01-20 |
| 5604005 | Magneto-optical disc | Hiroyuki Endo, Tsuyoshi Komaki, Hideki Hirata | 1997-02-18 |
| 5580633 | Magneto-optical disc having a protective layer of cured radiation curable resin containing carbon particles | Tsuneo Kuwahara, Hiroyuki Endo, Hideki Hirata | 1996-12-03 |
| 5578355 | Magneto-optical disk having a microporous protective coating containing a lubricant | Hideki Hirata, Hiroyuki Endo, Tsuyoshi Komaki | 1996-11-26 |
| 5568466 | Magneto-optical disc | Tsuyoshi Komaki, Hiroyuki Endo, Hideki Hirata | 1996-10-22 |
| 5487926 | Optical disk | Shin-ichi Tezuka | 1996-01-30 |
| 5279877 | Magneto optical disc | Ryota UCHIYAMA, Hiroyuki Endo, Shin-ichi Tezuka, Tsuneo Kuwahara, Hideki Hirata +1 more | 1994-01-18 |