Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4835583 | Semiconductor device having strained superlattice buffer layers with In-doped GaAs substrate | Makoto Morioka, Tomoyoshi Mishima, Kenji Hiruma, Yoshifumi Katayama | 1989-05-30 |
| 4805005 | Semiconductor device and manufacturing method of the same | Toshiyuki Usagawa, Yuichi Ono, Susumu Takahashi, Norikazu Hashimoto | 1989-02-14 |
| 4796068 | Semiconductor device having ultrahigh-mobility | Yoshifumi Katayama, Yoshimasa Murayama | 1989-01-03 |