Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879584 | Semiconductor device with isolation between MOSFET and control circuit | Yosuke Takagi, Yu Ohata, Koichi Kitahara | 1989-11-07 |
| 4837186 | Silicon semiconductor substrate with an insulating layer embedded therein and method for forming the same | Yu Ohata, Masaru Shimbo | 1989-06-06 |