Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11496102 | Amplifier | Kenji Harauchi, Yoshinobu Sasaki, Kazuya Yamamoto | 2022-11-08 |
| 10438942 | Field-effect transistor with protection diodes | Hiroaki Maehara, Kazuya Yamamoto | 2019-10-08 |
| 10340224 | Microwave and millimeter wave package | Kazuya Yamamoto, Hiroaki Maehara | 2019-07-02 |
| 9806039 | Amplifier | Naoki Kosaka, Hiroaki Maehara, Ko Kanaya, Kazuya Yamamoto | 2017-10-31 |
| 9685949 | ESD protection circuit and RF switch | Kazuya Yamamoto, Suguru Maki | 2017-06-20 |
| 9306500 | Cascode amplifier | Yoshinori Takahashi, Kazuya Yamamoto | 2016-04-05 |
| 9203368 | Power amplifier | Yoshinori Takahashi, Kazuya Yamamoto | 2015-12-01 |
| 9041473 | Power amplifier | Shigeru Fujiwara, Kazuya Yamamoto, Shigeo Yamabe, Daisuke Kobayashi | 2015-05-26 |
| 8890622 | Cascode amplifier | Kazuya Yamamoto, Fumimasa Kitabayashi, Suguru Maki, Eri Fukuda, Katsuya Kato | 2014-11-18 |
| 8558549 | Detector circuit and semiconductor device using same | Kazuya Yamamoto, Tomoyuki Asada | 2013-10-15 |
| 8461929 | Power amplifier | Kazuya Yamamoto, Takayuki Matsuzuka, Kenji Mukai | 2013-06-11 |
| 8289102 | Directional coupler | Kazuya Yamamoto, Hitoshi Kurusu, Tomoyuki Asada | 2012-10-16 |
| 8217722 | Power amplifier | Kazuya Yamamoto, Satoshi Suzuki, Takayuki Matsuzuka | 2012-07-10 |
| 8049483 | Reference voltage generation circuit and bias circuit | Kazuya Yamamoto | 2011-11-01 |
| 7907032 | Directional coupler | Kazuya Yamamoto | 2011-03-15 |
| 7705658 | Wave detector circuit | Kazuya Yamamoto, Takayuki Matsuzuka | 2010-04-27 |
| 7688133 | Power amplifier | Kazuya Yamamoto | 2010-03-30 |
| 7616060 | Power amplifier | Kazuya Yamamoto | 2009-11-10 |
| 7609126 | Diode switch and attenuator for reducing a bias current | Kazuya Yamamoto | 2009-10-27 |
| 7522001 | Power amplifier | Kazuya Yamamoto | 2009-04-21 |
| 7474170 | Attenuator | Kazuya Yamamoto | 2009-01-06 |
| 7474169 | Attenuator | Kazuya Yamamoto | 2009-01-06 |
| 7193463 | Driver circuit | Kazuya Yamamoto | 2007-03-20 |
| 6784720 | Current switching circuit | Kazuya Yamamoto, Masaaki Shimada | 2004-08-31 |
| 6051993 | Level shift circuit compensating for circuit element characteristic variations | — | 2000-04-18 |