Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12356094 | Event detection device | Kiyoshi Makigawa, Yusuke Ikeda | 2025-07-08 |
| 10587227 | Amplifier and electronic circuit | Hideyuki Takano, Fumitaka Kondo | 2020-03-10 |
| 7259615 | Bias voltage supply circuit and radio-frequency amplification circuit | Noboru Sasho | 2007-08-21 |
| 6804074 | PLL circuit and recording and playback apparatus using same | Junkichi Sugita, Kimimasa Senba, Toshihiro Kawakubo | 2004-10-12 |
| 6762894 | Head apparatus, hard disk apparatus and recording and playback apparatus | Keiji Narusawa | 2004-07-13 |
| 6693863 | Asymmetry correcting circuit and information reproducing apparatus using the same | Yuji Gendai, Kimimasa Senba, Nobuyoshi Kobayashi | 2004-02-17 |
| 6683740 | Architecture for a hard disk drive write amplifier circuit with damping control | Soon-Gil Jung, Shang-Ching Dong, Hiroshi Takeuchi, Keiji Narusawa, Michiya Sako | 2004-01-27 |
| 6614304 | Variable gain circuit having external controls and a low supply voltage | Tatsuya Shirakawa | 2003-09-02 |
| 6597650 | Nonlinearity compensation circuit and method, control circuit and method for nonlinearity compenstation circuit and recording and/or playback apparatus employing the same | Masayuki Katakura, Junkichi Sugita, Masato Sekine, Kimimasa Senba, Katsuhisa Daio | 2003-07-22 |
| 6496076 | PLL circuit and recorded data reproduction apparatus | Kimimasa Senba | 2002-12-17 |
| 6400184 | Transistor output circuit | Hideyuki Nishioka | 2002-06-04 |
| 6154333 | Amplification circuit | Keiji Narusawa | 2000-11-28 |
| 6075394 | PLL circuit and recording or reproducing apparatus utilizing the same | — | 2000-06-13 |
| 5940952 | Method for applying corrosion-protective coating to joint between corrosion-protectively coated steel pipes | Ryouichi Ikeda, Minoru Komura, Yoshihiro Okano, Toshiyuki Namioka, Akio Kida +1 more | 1999-08-24 |
| 5926936 | Method for applying corrosion-protective coating to joint between corrosion-protectively coated steel pipes | Ryouichi Ikeda, Minoru Komura, Yoshihiro Okano, Toshiyuki Namioka, Akio Kida +1 more | 1999-07-27 |
| 5898328 | PLL circuit having a switched charge pump for charging a loop filter up or down and signal processing apparatus using the same | — | 1999-04-27 |
| 5864249 | PLL circuit and recording or reproducing apparatus utilizing the same | — | 1999-01-26 |
| 5742199 | Filter circuit and electronic apparatus | Katsuyuki Yonezawa | 1998-04-21 |
| 5691663 | Single-ended supply preamplifier with high power supply rejection ratio | Mehrdad Nayebi, Mahmud Musbah | 1997-11-25 |
| 5525987 | Analog to digital converter circuit | Kunihiko Izuhara | 1996-06-11 |
| 5500774 | Current setting circuit to provide a write current to a recording apparatus | Shinichi Watanabe, Michiya Sako | 1996-03-19 |
| 4928074 | Automatic gain control circuit | Mitsuru Sato, Tetsuya Iizuka, Kiyoshi Furuya, Masato Sekine | 1990-05-22 |
| 4843303 | Voltage regulator circuit | — | 1989-06-27 |
| 4739304 | Digital-to-analog converting system | Masashi Takeda, Ikuro Hata, Masayuki Katakura | 1988-04-19 |
| 4714841 | Double-sided logic input differential switch | Masashi Takeda | 1987-12-22 |