Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4889831 | Method of forming a high temperature stable ohmic contact to a III-V substrate | Kazuaki Ishii, Toshiro Futatsugi, Toshio Fujii, Naoki Yokoyama, Akihiro Shibatomi | 1989-12-26 |
| 4868612 | Semiconductor device utilizing multiquantum wells | Toshiro Futatsugi | 1989-09-19 |
| 4864542 | Memory cartridge having stored data protecting function and memory protecting method | Tomotaka Ozeki | 1989-09-05 |