Issued Patents 2020
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10868155 | Compound semiconductor device | Kenji Sasaki, Kingo Kurotani, Takashi Kitahara | 2020-12-15 |
| 10855232 | Power amplifier module | Takayuki Tsutsui, Yasunari Umemoto, Isao Obu, Satoshi Tanaka | 2020-12-01 |
| 10777669 | Heterojunction bipolar transistor | Yasunari Umemoto, Isao Obu | 2020-09-15 |
| 10741680 | Bipolar transistor and method for producing the same | Yasunari Umemoto, Atsushi Kurokawa | 2020-08-11 |
| 10665704 | Bipolar transistor and radio-frequency power amplifier module | Isao Obu, Yasunari Umemoto, Masahiro Shibata, Masao Kondo, Takayuki Tsutsui | 2020-05-26 |
| 10629712 | Heterojunction bipolar transistor | Yasunari Umemoto, Isao Obu | 2020-04-21 |
| 10629591 | Semiconductor device | Takayuki Tsutsui, Kazuhito Nakai, Yusuke Tanaka | 2020-04-21 |
| 10541320 | Bipolar transistor and method for producing the same | Yasunari Umemoto, Atsushi Kurokawa | 2020-01-21 |