Issued Patents All Time
Showing 25 most recent of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11635501 | Circular polarization-type polarization diversity element, scanning element using same, and lidar | — | 2023-04-25 |
| 11327381 | Light beam switching element, assembly of same, and control method for same | — | 2022-05-10 |
| 11099446 | High-speed optical switching engine | — | 2021-08-24 |
| 10989981 | Optical beam deflection element and module | Masahiro Ookawa, Bing Yao | 2021-04-27 |
| 10613412 | Light beam deflecting element, wavelength-selective cross-connect device using same, and optical cross-connect device | Shu Namiki, Hitoshi Kawashima, Kazuhiro Ikeda | 2020-04-07 |
| 8503836 | Wavelength domain optical switch | Hiroshi Ishikawa, Toshifumi Hasama, Hitoshi Kawashima, Kenji Kintaka, Masahiko Mori +2 more | 2013-08-06 |
| 8229258 | Optical waveguide-type wavelength domain switch | Hiroshi Ishikawa, Toshifumi Hasama, Hitoshi Kawashima, Kenji Kintaka, Masahiko Mori +2 more | 2012-07-24 |
| 7567736 | Waveguide type wavelength domain optical switch | Hiroshi Ishikawa, Toshifumi Hasama, Masahiko Mori | 2009-07-28 |
| 7496256 | Diffraction grating and dispersion compensation circuit | Hiroyuki Tsuda, Hiroshi Ishikawa | 2009-02-24 |
| 6980707 | Waveguide type variable optical attenuator | Takafumi Chiba, Satoshi Takasugi, Tetsu Hasegawa | 2005-12-27 |
| 6947631 | Waveguide-type optical multiplexer/demultiplexer | Hideaki Arai, Takafumi Chiba, Masahiro Hikage | 2005-09-20 |
| 6724954 | Optical multiplexer/demultiplexer | Hideaki Arai, Takafumi Chiba | 2004-04-20 |
| 6668107 | Method and apparatus for reducing optical insertion loss in planar lightwave circuits through dielectric perturbation optimization | Marshall DePue, Shalini Venkatesh, Hiroaki Okano | 2003-12-23 |
| 6631223 | Optical multiplexer/demultiplexer | Hideaki Arai, Takafumi Chiba | 2003-10-07 |
| 6556749 | Array waveguide grating and method of manufacture thereof | Masahiro Okawa, Koichi Maru, Takafumi Chiba | 2003-04-29 |
| 6549696 | Optical wavelength multiplexer/demultiplexer | Masahiro Okawa, Koichi Maru, Hideki Nounen, Tatsuo Teraoka | 2003-04-15 |
| 6317534 | Optical wavelength routing device | Tetsuya Miyazaki, Shu Yamamoto, Koichi Maru | 2001-11-13 |
| 6093334 | Glass wave guide element and method of manufacturing the same | Ryoji Suzuki, Dai Kobayashi, Hideaki Arai, Korenori Tamura | 2000-07-25 |
| 6069990 | Optical wavelength multiplexer/demultiplexer | Masahiro Okawa, Hideaki Arai, Koichi Maru | 2000-05-30 |
| 6031957 | Glass wave guide element and method of manufacturing the same | Ryoji Suzuki, Dai Kobayashi, Hideaki Arai, Korenori Tamura | 2000-02-29 |
| 6021239 | Photocoupler and method for producing the same | Kohji Minami, Yukio Kurata, Hirobumi Ouchi | 2000-02-01 |
| 5995691 | Waveguide type grating device | Hideaki Arai, Ryoji Suzuki, Korenori Tamura | 1999-11-30 |
| 5903697 | Optical waveguide, method of making the same and integrated optical device | Yasufumi Yamada, Masahiro Yanagisawa, Hiroaki Okano, Keiichi Higuchi, Tatsuo Teraoka +2 more | 1999-05-11 |
| 5848207 | Optical device formed with grating therein, add/drop filter using same, and method of fabricating same | Hideaki Arai | 1998-12-08 |
| 5832154 | Optical device formed with grating therein, add/drop filter using same, and method of fabricating same | Hideaki Arai | 1998-11-03 |