Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7492975 | Optical switch, optical modulator and wavelength variable filter | Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Tadayuki Imai +4 more | 2009-02-17 |
| 7356227 | Optical switch, optical modulator and wavelength variable filter | Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Tadayuki Imai +4 more | 2008-04-08 |
| 7340116 | Optical switch, optical modulator and wavelength variable filter | Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Tadayuki Imai +4 more | 2008-03-04 |
| 7340147 | Optical waveguide material and optical waveguide | Tadayuki Imai, Kazuo Fujiura, Seiji Toyoda, Masahiro Sasaura, Tohru Matsuura | 2008-03-04 |
| 7336854 | Optical switch, optical modulator and wavelength variable filter | Seiji Toyoda, Kazuo Fujiura, Masahiro Sasaura, Koji Enbutsu, Tadayuki Imai +4 more | 2008-02-26 |
| 7177514 | Optical waveguide material and optical waveguide | Tadayuki Imai, Kazuo Fujiura, Seiji Toyoda, Masahiro Sasaura, Tohru Matsuura | 2007-02-13 |