Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888732 | Dynamic random access memory having open bit line architecture | Toshio Yamada | 1989-12-19 |
| 4807194 | Seimiconductor memory device having sub bit lines | Toshio Yamada | 1989-02-21 |