Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855248 | Method of making a semiconductor ROM device | Shoji Ariizumi, Taira Iwase | 1989-08-08 |
| 4814841 | Semiconductor device | Kiyofumi Ochii | 1989-03-21 |
| 4803529 | Electrically erasable and electrically programmable read only memory | — | 1989-02-07 |
| 4798794 | Method for manufacturing dynamic memory cell | Mitsugi Ogura | 1989-01-17 |