Issued Patents All Time
Showing 25 most recent of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10857323 | Audio signal generation device, audio signal generation method, and computer-readable storage medium | Kiyoshi Yamaki, Atsushi Ishihara, Takehiko Kawahara, Yuki Ueya | 2020-12-08 |
| 10831437 | Sound signal controlling apparatus, sound signal controlling method, and recording medium | Atsushi Ishihara, Kiyoshi Yamaki, Takehiko Kawahara | 2020-11-10 |
| 10413699 | Sleep guidance device and control method | Kiyoshi Yamaki, Takehiko Kawahara, Atsushi Ishihara | 2019-09-17 |
| 9978358 | Sound generator device and sound generation method | — | 2018-05-22 |
| 9893685 | Driving apparatus | — | 2018-02-13 |
| 9576192 | Method and apparatus for notifying motion | Takehiko Kawahara | 2017-02-21 |
| 8515090 | Ambient noise removal device | Takashi Norimatsu | 2013-08-20 |
| 8169260 | Amplifier circuit utilizing characteristic correction and smooth curvilinear correction | — | 2012-05-01 |
| 8044719 | Class D amplifier circuit | Takashi Norimatsu | 2011-10-25 |
| 8018824 | Optical disc recording apparatus | Teruhiko Tsurumi | 2011-09-13 |
| 7933418 | Sound reproducing apparatus and method of identifying positions of speakers | — | 2011-04-26 |
| 7920082 | D/A converter circuit and digital input class-D amplifier | Hirotaka Kawai, Nobuaki Tsuji, Yohei Otani | 2011-04-05 |
| 7859954 | Optical disk apparatus with approximate focus control of laser beam | — | 2010-12-28 |
| 7816981 | Signal generating apparatus and class-D amplifying apparatus | — | 2010-10-19 |
| 7795964 | Signal generating apparatus and class-D amplifying apparatus | — | 2010-09-14 |
| 7746756 | Optical disc recording apparatus | Teruhiko Tsurumi | 2010-06-29 |
| 7679435 | Digital input class-D amplifier | Nobuaki Tsuji, Hirotaka Kawai | 2010-03-16 |
| 7656946 | Pulse width modulation amplifier | — | 2010-02-02 |
| 7656779 | Method for forming visible images on optical recording medium | Akira Usui, Yusuke Konagai | 2010-02-02 |
| 7652603 | ΔΣ-type AD converter, class-D amplifier, and DC-DC converter | — | 2010-01-26 |
| 7646691 | Optical disk face discriminating system and optical disk drive | — | 2010-01-12 |
| 7586370 | Class D amplifier | — | 2009-09-08 |
| 7564757 | Optical disk recording apparatus | Yukihisa Nakajyo | 2009-07-21 |
| 7558169 | Discs, image forming methods and optical disc apparatuses for forming a multi-color image in a color forming layer on an optical disk | — | 2009-07-07 |
| 7538607 | Class D amplifier | — | 2009-05-26 |