Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4862416 | Semiconductor memory device with redundant memory cell | — | 1989-08-29 |
| 4812680 | High voltage detecting circuit | Hiromi Kawashima | 1989-03-14 |
| 4800304 | Time delay circuit for a semiconductor device | — | 1989-01-24 |