Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7505324 | Semiconductor memory device with a stacked gate including a floating gate and a control gate | Akira Umezawa | 2009-03-17 |
| 7505355 | Semiconductor memory device with MOS transistors each having floating gate and control gate | Kazushige Kanda, Akira Umezawa, Yoshiaki Hashiba, Yoshiharu Hirata | 2009-03-17 |
| 7120057 | Semiconductor memory device with a stacked gate including a floating gate and a control gate | Akira Umezawa | 2006-10-10 |
| 6188610 | Electrically erasable and programmable nonvolatile semiconductor memory device having data holding function and data holding method | Toru Okawa | 2001-02-13 |
| 5210436 | Semiconductor device with input protection circuit of high withstand voltage | Hiroaki Murakami | 1993-05-11 |