Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4884241 | Nonvolatile semiconductor memory device | Sumio Tanaka, Shinji Saito | 1989-11-28 |
| 4879689 | Nonvolatile semiconductor memory device | Sumio Tanaka, Shinji Saito, Nobauki Otsuka | 1989-11-07 |
| 4860260 | Semiconductor memory device with testing of redundant memory cells | Shinji Saito, Sumio Tanaka | 1989-08-22 |
| 4843594 | Nonvolatile semiconductor memory device with a bias circuit | Sumio Tanaka | 1989-06-27 |
| 4825271 | Nonvolatile semiconductor memory | Sumio Tanaka, Masaki Sato, Shinji Saito, Nobuaki Ohtsuka | 1989-04-25 |