Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5786612 | Semiconductor device comprising trench EEPROM | Toshiharu Katayama | 1998-07-28 |
| 5708285 | Non-volatile semiconductor information storage device | Toshiharu Katayama | 1998-01-13 |
| 5677204 | Method of evaluating a thin film for use in semiconductor device | Yukari Imai, Toshiharu Katayama | 1997-10-14 |
| 5633184 | Method of making semiconductor device with floating bate | Katsuhiko Tamura, Yukari Imai | 1997-05-27 |
| 5434813 | Semiconductor memory device and manufacturing method of the same | Katsuhiko Tamura, Yukari Imai | 1995-07-18 |