Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6075389 | Operation speed measuring circuit and semiconductor device incorporating the same circuit | Yasunobu Umemoto, Toshikazu Sei, Katsuro Doke | 2000-06-13 |
| 5614842 | Semiconductor integrated circuit with buffer circuit and manufacturing method thereof | Katsuro Doke, Toshikazu Sei, Yasunobu Umemoto | 1997-03-25 |