Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7394697 | Nonvolatile semiconductor memory device which stores multi-value information | Takayuki Kawahara, Katsutaka Kimura | 2008-07-01 |
| 7245532 | Nonvolatile semiconductor memory device which stores multi-value information | Takayuki Kawahara, Katsutaka Kimura | 2007-07-17 |
| 7031187 | Nonvolatile semiconductor memory device which stores multi-value information | Takayuki Kawahara, Katsutaka Kimura | 2006-04-18 |
| 6771537 | Nonvolatile semiconductor memory device which stores multi-value information | Takayuki Kawahara, Katsutaka Kimura | 2004-08-03 |
| 6396736 | Nonvolatile semiconductor memory device which stores multi-value information | Takayuki Kawahara, Katsutaka Kimura | 2002-05-28 |
| 6181603 | Nonvolatile semiconductor memory device having plural memory cells which store multi-value information | Takayuki Kawahara, Katsutaka Kimura | 2001-01-30 |
| 5982667 | Nonvolatile semiconductor memory device for storing multivalue information by controlling erase and plural write states of each memory cell | Takayuki Kawahara, Katsutaka Kimura | 1999-11-09 |
| 5892713 | Nonvolatile semiconductor memory device | Takayuki Kawahara, Katsutaka Kimura | 1999-04-06 |
| 5870218 | Nonvolatile semiconductor memory device which stores multi-value information | Takayuki Kawahara, Katsutaka Kimura | 1999-02-09 |
| 5694358 | Nonvolatile semiconductor memory device | Takayuki Kawahara, Syunichi Saeki, Naoki Miyamoto, Katsutaka Kimura | 1997-12-02 |