Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6656816 | Method for manufacturing semiconductor device | — | 2003-12-02 |
| 5869376 | Production method for semiconductor device having field-shield isolation structure | — | 1999-02-09 |
| 5796140 | Nonvolatile semiconductor memory device and a method of making the same | — | 1998-08-18 |
| 5793081 | Nonvolatile semiconductor storage device and method of manufacturing | Yasuo Sato | 1998-08-11 |
| 5754464 | Mask ROM with field shield transistors functioning as memory cells and method of reading data thereof | — | 1998-05-19 |
| 5668756 | Multi-value level type non-volatile semiconductor memory unit and method of rewriting the same | — | 1997-09-16 |
| 5641989 | Semiconductor device having field-shield isolation structures and a method of making the same | — | 1997-06-24 |
| 5640032 | Non-volatile semiconductor memory device with improved rewrite speed | — | 1997-06-17 |
| 5596527 | Electrically alterable n-bit per cell non-volatile memory with reference cells | Shoichi Iwasa, Yasuo Sato, Toshio Wada, Kenji Anzai | 1997-01-21 |
| 5418743 | Method of writing into non-volatile semiconductor memory | Shoichi Iwasa, Yasuo Sato, Toshio Wada, Kenji Anzai | 1995-05-23 |
| 5355023 | Semiconductor device having conducting layers connected through contact holes | Yukihiro Okeda, Yasuo Sato | 1994-10-11 |
| 5343062 | Semiconductor memory having a memory cell including a capacitor with a two-layer lower electrode | — | 1994-08-30 |