Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680349 | Nonvolatile semiconductor memory device having row decoder supplying a negative potential to word lines during erase mode | Shigeru Atsumi | 1997-10-21 |
| 5600592 | Nonvolatile semiconductor memory device having a word line to which a negative voltage is applied | Shigeru Atsumi | 1997-02-04 |