Issued Patents All Time
Showing 1–23 of 23 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8854716 | Reflection type variable optical attenuator | Hiroaki Ono, Hidenori Nakada, Yuko Ota, Taro Nakamura | 2014-10-07 |
| 8289071 | Charge pump | Masato Miyazaki, Tatsuya Kishii, Masayoshi Nakamura, Ken Makino | 2012-10-16 |
| 8284093 | Successive approximation A/D converter | — | 2012-10-09 |
| 8059834 | Automatic gain control circuit | Yasuomi Tanaka, Nobuaki Tsuji | 2011-11-15 |
| 7990211 | Class D amplifier circuit | Nobuaki Tsuji, Yasuomi Tanaka | 2011-08-02 |
| 7982522 | Semiconductor integrated circuit for realizing an amplifier having ringing reduction circuitry | Nobuaki Tsuji | 2011-07-19 |
| 7948313 | Class D amplifier circuit | Nobuaki Tsuji | 2011-05-24 |
| 7924089 | Offset voltage correction circuit and class D amplifier | Yasuomi Tanaka, Nobuaki Tsuji | 2011-04-12 |
| 7920082 | D/A converter circuit and digital input class-D amplifier | Nobuaki Tsuji, Morito Morishima, Yohei Otani | 2011-04-05 |
| 7912112 | Spectrum spreading circuit | Nobuaki Tsuji, Yasuomi Tanaka | 2011-03-22 |
| 7830182 | Comparator | Masaya Suzuki, Yasuomi Tanaka, Nobuaki Tsuji | 2010-11-09 |
| 7816992 | Offset voltage correction circuit and class D amplifier | Yasuomi Tanaka, Nobuaki Tsuji | 2010-10-19 |
| 7679435 | Digital input class-D amplifier | Nobuaki Tsuji, Morito Morishima | 2010-03-16 |
| 7336418 | Optical attenuator | Hiromitsu Umezawa, Isao Kojima, Hidenori Nakata, Teruhisa Sahashi | 2008-02-26 |
| 7006273 | Faraday rotation device and optical device using same | Teruhisa Sahashi, Hidenori Nakada, Isao Kojima, Tsugio Tokumasu | 2006-02-28 |
| 6906843 | Ferrule attachment type optical isolator, and manufacturing method thereof | Mitsuru Nagasawa | 2005-06-14 |
| 6876480 | Farady rotation device and optical device comprising it | Teruhisa Sahashi, Hidenori Nakada, Isao Kojima, Tsugio Tokumasu | 2005-04-05 |
| 6417952 | Faraday rotation angle varying device | Hiromitsu Umezawa | 2002-07-09 |
| 6288827 | Faraday rotator | Hiromitsu Umezawa, Hidenori Nakada, Nobuhiro Fukushima | 2001-09-11 |
| 6108120 | Faraday rotation angle varying apparatus | Hiromitsu Umezawa, Youichi Suzuki, Hidenori Nakada | 2000-08-22 |
| 5965287 | Magneto-optical element material and Faraday element using the same | Toshiyasu Suzuki, Hiromitsu Umezawa | 1999-10-12 |
| 5566017 | Material for magneto-optical element and faraday rotator using the same | Toshiyasu Suzuki, Hiromitsu Umezawa | 1996-10-15 |
| 5547613 | Magneto-optical element material formed of magnetic garnet single crystals | Shinzo Fujii, Hiromitsu Umezawa | 1996-08-20 |