Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4888631 | Semiconductor dynamic memory device | Yoshiji Ohta, Shinichi Tanaka | 1989-12-19 |
DA
Daisuke Azuma
Overall (1989): #124,041 of 140,708Top 90%
1
Patents 1989