Issued Patents 2020
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10855232 | Power amplifier module | Shigeki Koya, Takayuki Tsutsui, Isao Obu, Satoshi Tanaka | 2020-12-01 |
| 10778159 | Power amplifier and compound semiconductor device | Isao Obu, Satoshi Tanaka, Takayuki Tsutsui | 2020-09-15 |
| 10777669 | Heterojunction bipolar transistor | Shigeki Koya, Isao Obu | 2020-09-15 |
| 10741680 | Bipolar transistor and method for producing the same | Shigeki Koya, Atsushi Kurokawa | 2020-08-11 |
| 10665519 | Semiconductor chip, method for mounting semiconductor chip, and module in which semiconductor chip is packaged | Isao Obu, Masahiro Shibata | 2020-05-26 |
| 10665704 | Bipolar transistor and radio-frequency power amplifier module | Isao Obu, Masahiro Shibata, Shigeki Koya, Masao Kondo, Takayuki Tsutsui | 2020-05-26 |
| 10636897 | Semiconductor device having a collector layer including first-conductivity-type semiconductor layers | Atsushi Kurokawa, Tsunekazu Saimei | 2020-04-28 |
| 10629712 | Heterojunction bipolar transistor | Shigeki Koya, Isao Obu | 2020-04-21 |
| 10594271 | Semiconductor device and power amplifier module | Isao Obu, Masahiro Shibata, Kenichi Nagura | 2020-03-17 |
| 10559547 | Semiconductor chip | Masahiro Shibata, Daisuke Tokuda, Atsushi Kurokawa, Hiroaki Tokuya | 2020-02-11 |
| 10541320 | Bipolar transistor and method for producing the same | Shigeki Koya, Atsushi Kurokawa | 2020-01-21 |