Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7092333 | Device and program for checking optical disks | Takashi Yumiba, Keiichi Kawashima | 2006-08-15 |
| 7023779 | Optical disc, recording device, and recording device | Keiichi Kawashima, Takashi Yumiba | 2006-04-04 |
| 6682583 | Process for producing sintered ore and the sintered ore | Toshihide Matsumura, Jyunpei Kiguchi | 2004-01-27 |
| 5498399 | Process for removing nitrogen oxides | Shoji Shirouchi, Takeshi Sugiyama | 1996-03-12 |
| 5366950 | Catalyst and process for removing nitrogen oxides | Shoji Shirouchi, Takeshi Sugiyama | 1994-11-22 |