Issued Patents All Time
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11557554 | Semiconductor device | Katsumi Miyawaki | 2023-01-17 |
| 11309231 | Semiconductor device | Hiroaki Ichinohe, Katsumi Miyawaki | 2022-04-19 |
| 8354888 | Power amplifier | Takayuki Matsuzuka, Kazuya Yamamoto | 2013-01-15 |
| 7928804 | Power amplifier | Kazuya Yamamoto, Satoshi Suzuki, Takao Haruna | 2011-04-19 |
| 7012469 | Integrated circuit device having high efficiency at the time of low power output | Hiroyuki Otsuka | 2006-03-14 |
| 6946913 | High frequency amplifier circuit | Yuji Yamamoto, Kosei Maemura | 2005-09-20 |
| 6750718 | Radio-frequency amplifier | Kousei Maemura | 2004-06-15 |
| 6577200 | High-frequency semiconductor device | — | 2003-06-10 |
| 6066993 | Duplexer circuit apparatus provided with amplifier and impedance matching inductor | Kazuya Yamamoto | 2000-05-23 |