Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4872041 | Semiconductor device equipped with a field effect transistor having a floating gate | June Sugiura | 1989-10-03 |
| 4818716 | Semiconductor device and manufacturing method thereof | Kousuke Okuyama, Ken Uchida, Kouichi Kusuyama, Satoshi Meguro, Hisao Katto | 1989-04-04 |
| 4818718 | Method of manufacturing semiconductor memory device | Yasunobu Kosa | 1989-04-04 |