Issued Patents 1989
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868632 | Nonvolatile semiconductor memory | Itsunari Hayabuchi, Tatsuo Tsuchiya, Seiichi Ishihara | 1989-09-19 |
| 4823217 | Circuiting device | Minoru Kato | 1989-04-18 |
| 4821236 | Semiconductor nonvolatile memory | Yoshikazu Kojima, Masaaki Kamiya, Kojiro Tanaka | 1989-04-11 |
| 4818867 | Optical information processing device using optical shutter elements | Seiichi Ishihara, Hisato Hiraishi | 1989-04-04 |
| 4811070 | Heterojunction bipolar transistor with inversion layer base | Kazuhiko Matsumoto, Nobuo Hashizume | 1989-03-07 |