Issued Patents 2023
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11830917 | Unit cell and power amplifier module | Shaojun MA, Shigeki Koya | 2023-11-28 |
| 11817356 | Semiconductor device | Shigeki Koya, Isao Obu, Kaoru IDENO | 2023-11-14 |
| 11784245 | Semiconductor device | Kenji Sasaki, Shigeki Koya, Shinnosuke Takahashi, Masao Kondo | 2023-10-10 |
| 11705509 | Heterojunction bipolar transistor | Shigeki Koya, Isao Obu | 2023-07-18 |
| 11705875 | Power amplifier module | Shigeki Koya, Yuichi Saito, Isao Obu, Takayuki Tsutsui | 2023-07-18 |
| 11658180 | Semiconductor device having a plurality of bipolar transistors with different heights between their respective emitter layers and emitter electrodes | Isao Obu, Shigeki Koya, Takayuki Tsutsui | 2023-05-23 |
| 11631758 | Semiconductor device | Isao Obu, Kaoru IDENO, Shigeki Koya | 2023-04-18 |
| 11626511 | Semiconductor device | Isao Obu, Masahiro Shibata, Shigeki Koya, Masao Kondo, Takayuki Tsutsui | 2023-04-11 |
| 11621678 | Semiconductor device and power amplifier module | Isao Obu, Masahiro Shibata, Kenichi Nagura | 2023-04-04 |
| 11557664 | Heterojunction bipolar transistor including ballast resistor and semiconductor device | Isao Obu, Takayuki Tsutsui, Satoshi Tanaka | 2023-01-17 |