Kawai; Hirotaka
Patent Applications and Registrations
Patent applications and USPTO patent grants for Kawai; Hirotaka.The latest application filed is for "reflection type variable optical attenuator".
- Kawai; Hirotaka - Tokyo N/A JP
- Kawai; Hirotaka - Hamamatsu JP
- Kawai; Hirotaka - Hamamatsu-shi JP
- Kawai; Hirotaka - Minato-ku JP
- Kawai; Hirotaka - Shizuoka JP
| Patent | Date |
|---|---|
| Reflection type variable optical attenuator Grant 8,854,716 - Ono , et al. October 7, 2 | 2014-10-07 |
| Reflection Type Variable Optical Attenuator App 20130120824 - Ono; Hiroaki ; et al. | 2013-05-16 |
| Charge pump Grant 8,289,071 - Miyazaki , et al. October 16, 2 | 2012-10-16 |
| Successive approximation A/D converter Grant 8,284,093 - Kawai October 9, 2 | 2012-10-09 |
| Automatic gain control circuit Grant 8,059,834 - Tanaka , et al. November 15, 2 | 2011-11-15 |
| Class D amplifier circuit Grant 7,990,211 - Kawai , et al. August 2, 2 | 2011-08-02 |
| Semiconductor integrated circuit for realizing an amplifier having ringing reduction circuitry Grant 7,982,522 - Tsuji , et al. July 19, 2 | 2011-07-19 |
| Successive aproximation A/D Converter App 20110133963 - Kawai; Hirotaka | 2011-06-09 |
| Class D amplifier circuit Grant 7,948,313 - Tsuji , et al. May 24, 2 | 2011-05-24 |
| Offset voltage correction circuit and class D amplifier Grant 7,924,089 - Tanaka , et al. April 12, 2 | 2011-04-12 |
| D/A converter circuit and digital input class-D amplifier Grant 7,920,082 - Kawai , et al. April 5, 2 | 2011-04-05 |
| Charge pump App 20110068856 - Miyazaki; Masato ; et al. | 2011-03-24 |
| Spectrum spreading circuit Grant 7,912,112 - Kawai , et al. March 22, 2 | 2011-03-22 |
| Offset voltage correction circuit and class D amplifier App 20110006843 - Tanaka; Yasuomi ; et al. | 2011-01-13 |
| Comparator Grant 7,830,182 - Suzuki , et al. November 9, 2 | 2010-11-09 |
| Offset voltage correction circuit and class D amplifier Grant 7,816,992 - Tanaka , et al. October 19, 2 | 2010-10-19 |
| Class D amplifier circuit App 20100244958 - Tsuji; Nobuaki ; et al. | 2010-09-30 |
| Semiconductor Integrated Circuit App 20100164590 - TSUJI; NOBUAKI ; et al. | 2010-07-01 |
| D/A converter circuit and digital input class-D amplifier App 20100117730 - Kawai; Hirotaka ; et al. | 2010-05-13 |
| Digital input class-D amplifier Grant 7,679,435 - Tsuji , et al. March 16, 2 | 2010-03-16 |
| Comparator App 20090102516 - Suzuki; Masaya ; et al. | 2009-04-23 |
| Class D amplifier circuit App 20090027121 - Kawai; Hirotaka ; et al. | 2009-01-29 |
| Digital input class-D amplifier App 20080224773 - Tsuji; Nobuaki ; et al. | 2008-09-18 |
| Optical attenuator Grant 7,336,418 - Kawai , et al. February 26, 2 | 2008-02-26 |
| Spectrum spreading circuit App 20080032640 - Kawai; Hirotaka ; et al. | 2008-02-07 |
| Offset voltage correction circuit and class D amplifier App 20080018393 - Tanaka; Yasuomi ; et al. | 2008-01-24 |
| Semiconductor integrated circuit App 20080012632 - Tsuji; Nobuaki ; et al. | 2008-01-17 |
| Automatic gain control circuit App 20080008336 - Tanaka; Yasuomi ; et al. | 2008-01-10 |
| Faraday rotation device and optical device using same Grant 7,006,273 - Sahashi , et al. February 28, 2 | 2006-02-28 |
| Faraday rotation device and optical device using same App 20050141075 - Sahashi, Teruhisa ; et al. | 2005-06-30 |
| Ferrule attachment type optical isolator, and manufacturing method thereof Grant 6,906,843 - Nagasawa , et al. June 14, 2 | 2005-06-14 |
| Ferrule Attachment Type Optical Isolator, And Manufacturing Method Thereof App 20050094239 - Nagasawa, Mitsuru ; et al. | 2005-05-05 |
| Farady rotation device and optical device comprising it Grant 6,876,480 - Sahashi , et al. April 5, 2 | 2005-04-05 |
| Farady rotation device and optical device comprising it App 20040027637 - Sahashi, Teruhisa ; et al. | 2004-02-12 |
| Faraday rotator Grant 6,288,827 - Kawai , et al. September 11, 2 | 2001-09-11 |
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