Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6181631 | Semiconductor memory device with a reduce access time by devising a layout of a circuit without elaborate modification | Tomoko Nobutoki | 2001-01-30 |
| 6175534 | Synchronous semiconductor storage device | Junya Taniguchi, Yasuji Koshikawa | 2001-01-16 |
| 6122207 | Semiconductor memory device and method for relieving defective memory cells | Yasuji Koshikawa, Tomoko Nobutoki | 2000-09-19 |
| 6094387 | Roll call tester | Yasuji Koshikawa, Tomoko Nobutoki | 2000-07-25 |