Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4849368 | Method of producing a two-dimensional electron gas semiconductor device | Yoshimi Yamashita, Kinjiro Kosemura, Hidetoshi Ishiwari, Shigeru Kuroda | 1989-07-18 |
SY
Sumio Yamamoto
Overall (1989): #54,118 of 140,708Top 40%
1
Patents 1989