Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE44350 | Nonvolatile semiconductor memory including multi-threshold voltage memory cells including voltage ranges indicating either an erase state or a two or more program state | Keiichi Yoshida | 2013-07-09 |
| 8004905 | Nonvolatile memory system, semiconductor memory and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2011-08-23 |
| 7697345 | Nonvolatile memory system, semiconductor memory, and writing method | Tetsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2010-04-13 |
| 7405979 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2008-07-29 |
| 7283399 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2007-10-16 |
| 7145805 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2006-12-05 |
| 7072222 | Nonvolatile memory system, semiconductor memory and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2006-07-04 |
| 6906952 | Nonvolatile semiconductor memory device and data writing method therefor | Keiichi Yoshida | 2005-06-14 |
| 6873552 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2005-03-29 |
| 6683811 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2004-01-27 |
| 6567311 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2003-05-20 |
| 6525960 | Nonvolatile semiconductor memory device including correction of erratic memory cell data | Keiichi Yoshida | 2003-02-25 |
| 6452838 | Nonvolatile memory system, semiconductor memory and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2002-09-17 |
| 6392932 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2002-05-21 |
| 6385092 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2002-05-07 |
| 6320785 | Nonvolatile semiconductor memory device and data writing method therefor | Keiichi Yoshida | 2001-11-20 |
| 6157573 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2000-12-05 |
| 6023425 | Nonvolatile memory system, semiconductor memory, and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 2000-02-08 |
| 6009016 | Nonvolatile memory system semiconductor memory and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 1999-12-28 |
| 5982668 | Nonvolatile memory system, semiconductor memory and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 1999-11-09 |
| 5959882 | Nonvolatile semiconductor memory device and data writing method therefor | Keiichi Yoshida | 1999-09-28 |
| 5867428 | Nonvolatile memory system semiconductor memory and writing method | Tatsuya Ishii, Hitoshi Miwa, Osamu Tsuchiya | 1999-02-02 |
| 5553021 | Semiconductor integrated circuit device including a voltage generator for providing desired interval internal voltages | Hitoshi Kume | 1996-09-03 |