Issued Patents All Time
Showing 1–14 of 14 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7266015 | Redundancy substitution method, semiconductor memory device and information processing apparatus | Osamu Iioka, Hiroshi Mawatari | 2007-09-04 |
| 7227784 | Nonvolatile semiconductor memory device performing erase operation that creates narrow threshold distribution | — | 2007-06-05 |
| 6928000 | Semiconductor memory device having a resistance adjustment unit | Yoshikazu Homma | 2005-08-09 |
| 6735120 | Semiconductor device having a high-speed data read operation | Yoshikazu Homma | 2004-05-11 |
| 6532174 | Semiconductor memory device having high speed data read operation | Yoshikazu Homma | 2003-03-11 |
| 6215717 | Semiconductor memory device for reducing a time needed for performing a protecting operation | Haruo Shoji | 2001-04-10 |
| 5770963 | Flash memory with improved erasability and its circuitry | Takao Akaogi, Hiromi Kawashima, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more | 1998-06-23 |
| 5631597 | Negative voltage circuit for a flash memory | Takao Akaogi, Hiromi Kawashima, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more | 1997-05-20 |
| 5619450 | Drive circuit for flash memory with improved erasability | — | 1997-04-08 |
| 5608670 | Flash memory with improved erasability and its circuitry | Takao Akaogi, Hiromi Kawashima, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more | 1997-03-04 |
| 5592419 | Flash memory with improved erasability and its circuitry | Takao Akaogi, Hiromi Kawashima, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more | 1997-01-07 |
| 5576637 | XOR CMOS logic gate | Takao Akaogi, Hiromi Kawashima, Ryoji Hagiwara, Yasushi Kasa, Kiyoshi Itano +2 more | 1996-11-19 |
| 5400276 | Electrically erasable nonvolatile semiconductor memory that permits data readout despite the occurrence of over-erased memory cells | — | 1995-03-21 |
| 4720818 | Semiconductor memory device adapted to carry out operation test | — | 1988-01-19 |