Issued Patents 2021
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11196394 | Power amplifier module | Shigeki Koya, Yasunari Umemoto, Yuichi Saito, Takayuki Tsutsui | 2021-12-07 |
| 11164963 | Bipolar transistor and radio-frequency power amplifier module | Yasunari Umemoto, Masahiro Shibata, Shigeki Koya, Masao Kondo, Takayuki Tsutsui | 2021-11-02 |
| 11107909 | Semiconductor device | Yasunari Umemoto, Kaoru IDENO, Shigeki Koya | 2021-08-31 |
| 11075289 | Heterojunction bipolar transistor including ballast resistor and semiconductor device | Yasunari Umemoto, Takayuki Tsutsui, Satoshi Tanaka | 2021-07-27 |
| 10972060 | Radio frequency power amplifier and power amplifier module | Kenji Sasaki, Takayuki Tsutsui | 2021-04-06 |
| 10964693 | Semiconductor device having a plurality of bipolar transistors with different heights between their respective emitter layers and emitter electrodes | Shigeki Koya, Yasunari Umemoto, Takayuki Tsutsui | 2021-03-30 |
| 10957617 | Semiconductor device | Masao Kondo, Yasunari Umemoto, Yasuhisa Yamamoto, Masahiro Shibata, Takayuki Tsutsui | 2021-03-23 |
| 10903803 | Semiconductor device and power amplifier module | Yasunari Umemoto, Masahiro Shibata, Kenichi Nagura | 2021-01-26 |
| 10886388 | Heterojunction bipolar transistor | Yasunari Umemoto, Shigeki Koya | 2021-01-05 |