Issued Patents 2003
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6646920 | Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics | Nobuaki Takashina, Yasushi Kasa | 2003-11-11 |
| 6611464 | Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics | Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Hiromi Kawashima, Minoru Yamashita +1 more | 2003-08-26 |
| 6574149 | Semiconductor memory and its usage | Yuichi Einaga | 2003-06-03 |
| 6563738 | Nonvolatile semiconductor memory device having electrically and collectively erasable characteristics | Takao Akaogi, Nobuaki Takashina, Yasushi Kasa, Hiromi Kawashima, Minoru Yamashita | 2003-05-13 |