Issued Patents All Time
Showing 25 most recent of 40 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11539361 | Semiconductor device signal transmission circuit for drive-control, method of controlling semiconductor device signal transmission circuit for drive-control, semiconductor device, power conversion device, and electric system for railway vehicle | Seiichi Hayakawa, Yuji Takayanagi, Takae Shimada, Takashi Wada | 2022-12-27 |
| 11496041 | Gate drive device, gate drive method, power semiconductor module, and electric power conversion device | Daisuke IKARASHI, Seiichi Hayakawa, Yuji Takayanagi, Masamitsu Inaba | 2022-11-08 |
| 10888941 | Power semiconductor module | Daichi KAWAMURA, Junpei Kusukawa, Naoki Sakurai | 2021-01-12 |
| 10488515 | Acoustic emission wave detection system for a high voltage apparatus | Daichi KAWAMURA, Hiroshi Kageyama, Ayumu Hatanaka | 2019-11-26 |
| 10115700 | Power module, electrical power conversion device, and driving device for vehicle | Ryuusei FUJITA, Satoru Akiyama, Hiroshi Kageyama, Ayumu Hatanaka, Akio Shima | 2018-10-30 |
| 10002858 | Power transistor module | Akitoyo Konno | 2018-06-19 |
| 8502614 | Variable inductor, and oscillator and communication system using the same | Takahiro Nakamura | 2013-08-06 |
| 8212615 | Variable-gain amplifier circuit and wireless communication device integrated circuit equipped therewith | Nobuhiro Shiramizu, Takahiro Nakamura, Katsuyoshi Washio | 2012-07-03 |
| 8121579 | Active mixer circuit and a receiver circuit or a millimeter-wave communication unit using it | Nobuhiro Shiramizu, Takahiro Nakamura, Katsuyoshi Washio, Masamichi Tanabe | 2012-02-21 |
| 7902934 | Variable inductor, and oscillator and communication system using the same | Takahiro Nakamura | 2011-03-08 |
| 7843287 | Active resonant circuit with resonant-frequency tunability | Hiroshi Mori | 2010-11-30 |
| 7839229 | Voltage-controlled oscillator and communication device using the same | Takahiro Nakamura | 2010-11-23 |
| 7826814 | Frequency synthesizer | — | 2010-11-02 |
| 7821335 | Semiconductor integrated circuit with variable gain amplifier | Nobuhiro Shiramizu | 2010-10-26 |
| 7642618 | Semiconductor devices with inductors | Nobuhiro Shiramizu, Takahiro Nakamura, Nobuhiro Kasa, Hiroshi Mori | 2010-01-05 |
| 7592877 | Variable frequency oscillator and communication circuit with it | Nobuhiro Shiramizu | 2009-09-22 |
| 7589596 | Voltage controlled oscillator and wireless transceiver using the same | Hiroshi Mori | 2009-09-15 |
| 7518458 | Oscillator and data processing equipment using the same and voltage control oscillator and data processing equipment using voltage control oscillator | Takahiro Nakamura, Tomomitsu Kitamura, Norio Hayashi, Hiroshi Mori | 2009-04-14 |
| 7177612 | Frequency generator and communication system using the same | Takahiro Nakamura, Kenichi Ohhata | 2007-02-13 |
| 7098740 | Radio frequency power amplifier and communication system | Masao Kondo, Katsuyoshi Washio | 2006-08-29 |
| 7091757 | Frequency generator and communication system | — | 2006-08-15 |
| 6785477 | Optical receiver using variable negative-capacitance circuit | Katsuyoshi Washio, Taizo Yoshikawa, Eiji Ohue, Kenichi Ohhata | 2004-08-31 |
| 6658217 | Optical receiver | Kenichi Ohhata, Ryoji Takeyari, Katsuyoshi Washio, Yasushi Hatta | 2003-12-02 |
| 6603029 | Partially protected novel trisphenols and process for production thereof | Taiichi Shiomi, Sachiko Miyagi | 2003-08-05 |
| 6304357 | Optical receiver | Kenichi Ohhata, Ryoji Takeyari, Katsuyoshi Washio, Yasushi Hatta | 2001-10-16 |