Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7846252 | Silicon wafer for IGBT and method for producing same | Shigeru Umeno, Koji Kato | 2010-12-07 |
| 7615467 | Method for manufacturing SOI wafer | Takaaki Shiota | 2009-11-10 |
| 7582540 | Method for manufacturing SOI wafer | Takaaki Shiota | 2009-09-01 |
| 7344689 | Silicon wafer for IGBT and method for producing same | Shigeru Umeno, Koji Kato | 2008-03-18 |
| 4925515 | Method and apparatus for applying a protective tape on a wafer and cutting it out to shape | Yoshitaka Yoshimura | 1990-05-15 |