Issued Patents 2019
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10374071 | Heterojunction bipolar transistor | Yasunari Umemoto, Shigeki Koya, Isao Obu | 2019-08-06 |
| 10355114 | Heterojunction bipolar transistor | Isao Obu, Yasunari Umemoto, Masahiro Shibata | 2019-07-16 |
| 10249620 | Semiconductor device and power amplifier circuit | Isao Obu, Kaoru IDENO | 2019-04-02 |