Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823235 | Earth connection device in metal core printed circuit board | Mitsuaki Suzuki, Katsuyuki Arai, Yasushi Kojima, Mitsusada Toyama, Jun Sakiura +1 more | 1989-04-18 |
| 4820652 | Manufacturing process and structure of semiconductor memory devices | — | 1989-04-11 |