Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11164963 | Bipolar transistor and radio-frequency power amplifier module | Isao Obu, Yasunari Umemoto, Shigeki Koya, Masao Kondo, Takayuki Tsutsui | 2021-11-02 |
| 11158592 | Semiconductor device | Atsushi Kurokawa | 2021-10-26 |
| 10957617 | Semiconductor device | Masao Kondo, Isao Obu, Yasunari Umemoto, Yasuhisa Yamamoto, Takayuki Tsutsui | 2021-03-23 |
| 10903803 | Semiconductor device and power amplifier module | Isao Obu, Yasunari Umemoto, Kenichi Nagura | 2021-01-26 |