Issued Patents All Time
Showing 1–25 of 59 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8711359 | Delay interferometer using magneto-optic effect of a variable faraday rotator | — | 2014-04-29 |
| 8331744 | Optical switch | Hiroyuki Furukawa | 2012-12-11 |
| 7792436 | Optical receiver corresponding to differential M-phase shift keying system | Takeshi Hoshida | 2010-09-07 |
| 7535616 | Polarization controlling apparatus and polarization operation apparatus | Kazuo Hironishi, Jens Rasmussen | 2009-05-19 |
| 7340128 | Wavelength selection device | Kohei Shibata, Tamotsu Akashi, Toshiya Kishida, Tsuyoshi Yamamoto, Hirofumi Aota +4 more | 2008-03-04 |
| 7330617 | Wavelength selective optical switch, and optical device provided with spectroscopic function | Hirofumi Aota, Kohei Shibata, Tamotsu Akashi, Shinji Yamashita, Tsuyoshi Yamamoto +4 more | 2008-02-12 |
| 7171084 | Optical apparatus provided with demultiplexing function | Hirotomo Izumi | 2007-01-30 |
| 7050216 | Variable optical filter | Hidenori Nakada, Tsugio Tokumasu, Yuko Ota | 2006-05-23 |
| 6999655 | Optical communication system and optical communication method having confidentiality | — | 2006-02-14 |
| 6753997 | Magnetic field generator for optical devices utilizing magneto-optical effect | Seimi Sasaki, Satoshi Tachibana | 2004-06-22 |
| 6717713 | Variable optical attenuator which applies a magnetic field to a faraday element to rotate the polarization of a light signal | Hiroshi Onaka | 2004-04-06 |
| 6717730 | Tunable optical filter | Takafumi Terahara | 2004-04-06 |
| 6666944 | Method of manufacturing optical filter | — | 2003-12-23 |
| 6570699 | Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal | Hiroshi Onaka | 2003-05-27 |
| 6507422 | Optical attenuator and system, optical amplifier, and terminal device each having the optical attenuator | — | 2003-01-14 |
| 6493129 | Tunable optical filter | Takafumi Terahara | 2002-12-10 |
| 6407836 | Optical attenuator and system, optical amplifier, and terminal device each having the optical attenuator | — | 2002-06-18 |
| 6392784 | Faraday rotator | Seiichi Ikeda, Hirohiko Sonada | 2002-05-21 |
| 6384957 | Variable optical attenuator utilizing Faraday effect | Seiichi Ikeda, Hirohiko Sonoda | 2002-05-07 |
| 6339492 | Tunable optical filter | Takafumi Terahara | 2002-01-15 |
| 6334924 | Method of manufacturing optical filter | — | 2002-01-01 |
| 6333806 | Variable optical attenuator which applies a magnetic field to a Faraday element to rotate the polarization of a light signal | Hiroshi Onaka | 2001-12-25 |
| 6299911 | Extract of Touchi containing an .alpha.-glucosidase inhibitor | Jun Kawabata, Takanori Kasai, Hiroyuki Fujita | 2001-10-09 |
| 6288827 | Faraday rotator | Hirotaka Kawai, Hiromitsu Umezawa, Hidenori Nakada | 2001-09-11 |
| 6275323 | Optical attenuator | — | 2001-08-14 |