Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646920 | Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics | Yasushi Kasa, Kiyoshi Itano | 2003-11-11 |
| 6611464 | Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics | Takao Akaogi, Yasushi Kasa, Kiyoshi Itano, Hiromi Kawashima, Minoru Yamashita +1 more | 2003-08-26 |
| 6563738 | Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics | Takao Akaogi, Yasushi Kasa, Kiyoshi Itano, Hiromi Kawashima, Minoru Yamashita | 2003-05-13 |
| 5959887 | Electrically erasable programmable nonvolatile semiconductor memory having dual operation function | Masanobu Yoshida | 1999-09-28 |
| 5815440 | Semiconductor memory device with electrically controllable threshold voltage | Takao Akaogi, Yasushi Kasa, Kiyoshi Itano, Hiromi Kawashima, Minoru Yamashita +1 more | 1998-09-29 |
| 5666314 | Semiconductor memory device for selecting and deselecting blocks of word lines | Takao Akaogi, Yasushi Kasa, Kiyoshi Itano, Hiromi Kawashima, Minoru Yamashita | 1997-09-09 |
| 5581107 | Nonvolatile semiconductor memory that eases the dielectric strength requirements | Shouichi Kawamura, Yasushi Kasa, Kiyoshi Itano | 1996-12-03 |
| 5463583 | Non-volatile semiconductor memory device | — | 1995-10-31 |
| 5452251 | Semiconductor memory device for selecting and deselecting blocks of word lines | Takao Akaogi, Yasushi Kasa, Kiyoshi Itano, Hiromi Kawashima, Minoru Yamashita | 1995-09-19 |
| 5406524 | Nonvolatile semiconductor memory that eases the dielectric strength requirements | Shouichi Kawamura, Yasushi Kasa, Kiyoshi Itano | 1995-04-11 |
| 5237530 | Frasable non-volatile semiconductor memory device having read/write test function | Takao Akaogi, Masanobu Yoshida | 1993-08-17 |