Issued Patents 2021
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11196394 | Power amplifier module | Shigeki Koya, Yasunari Umemoto, Yuichi Saito, Isao Obu | 2021-12-07 |
| 11164963 | Bipolar transistor and radio-frequency power amplifier module | Isao Obu, Yasunari Umemoto, Masahiro Shibata, Shigeki Koya, Masao Kondo | 2021-11-02 |
| 11075289 | Heterojunction bipolar transistor including ballast resistor and semiconductor device | Isao Obu, Yasunari Umemoto, Satoshi Tanaka | 2021-07-27 |
| 11018639 | Power amplifier circuit | Masao Kondo, Satoshi Tanaka | 2021-05-25 |
| 11006371 | High-frequency signal processing apparatus and wireless communication apparatus | Satoshi Tanaka, Kiichiro Takenaka, Taizo Yamawaki, Shun Imai | 2021-05-11 |
| 10985123 | Semiconductor apparatus | Atsushi Kurokawa, Masayuki Aoike | 2021-04-20 |
| 10972060 | Radio frequency power amplifier and power amplifier module | Kenji Sasaki, Isao Obu | 2021-04-06 |
| 10964693 | Semiconductor device having a plurality of bipolar transistors with different heights between their respective emitter layers and emitter electrodes | Isao Obu, Shigeki Koya, Yasunari Umemoto | 2021-03-30 |
| 10957617 | Semiconductor device | Masao Kondo, Isao Obu, Yasunari Umemoto, Yasuhisa Yamamoto, Masahiro Shibata | 2021-03-23 |
| 10923470 | Semiconductor device | Shigeki Koya, Kazuhito Nakai, Yusuke Tanaka | 2021-02-16 |