Issued Patents All Time
Showing 26–41 of 41 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6741378 | Optical modulator having element for varying optical phase by electrooptic effect | Masaki Sugiyama, Masaharu Doi | 2004-05-25 |
| 6728487 | Drive method for a plurality of acousto-optic filters, acousto-optic filter apparatus, and selective wavelength extension method | — | 2004-04-27 |
| 6721085 | Optical modulator and design method therefor | Masaki Sugiyama | 2004-04-13 |
| 6701031 | Acousto-optical tunable filter, method of driving the same, and optical add/drop multiplexer | — | 2004-03-02 |
| 6697543 | Optical waveguide filter | Hiroshi Miyata | 2004-02-24 |
| 6678428 | Optical modulator | Minoru Seino, Tetsuo Ishizaka, Takehito Tanaka, Masaharu Doi | 2004-01-13 |
| 6643060 | Multi-wavelength light source utilizing acousto-optic tunable filter | Naoki Hashimoto | 2003-11-04 |
| 6594069 | Control method and control apparatus of optical wavelength variable filter | Hideyuki Miyata | 2003-07-15 |
| 6583900 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hiroshi Onaka, Hideyuki Miyata, Kazue Otsuka, Yutaka Kai, Terumi Chikama | 2003-06-24 |
| 6549328 | Acousto-optic tunable filter | Shinichi Aoki | 2003-04-15 |
| 6400881 | Optical device having thin film formed over optical waveguide | Minoru Seino, Shinji Taniguchi | 2002-06-04 |
| 6370308 | Acousto-optical device | Minoru Seino, Shinji Taniguchi | 2002-04-09 |
| 6351323 | Optical transmission apparatus, optical transmission system, and optical terminal station | Hiroshi Onaka, Hideyuki Miyata, Kazue Otsuka, Yutaka Kai, Terumi Chikama | 2002-02-26 |
| 5680497 | Optical waveguide device | Minoru Seino, Takashi Yamane, Yoshinobu Kubota, Masaharu Doi, Kunio Sugeta +1 more | 1997-10-21 |
| 5404412 | Optical waveguide device | Minoru Seino, Takashi Yamane, Yoshinobu Kubota, Masaharu Doi, Kunio Sugeta +1 more | 1995-04-04 |
| 5214724 | Optical waveguide device with suppressed DC drift | Minoru Seino, Naoyuki Mekada, Yoshinobu Kubota, Masaharu Doi | 1993-05-25 |