Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8503836 | Wavelength domain optical switch | Hiroshi Ishikawa, Toshifumi Hasama, Hitoshi Kawashima, Masahiko Mori, Hisato Uetsuka +2 more | 2013-08-06 |
| 8229258 | Optical waveguide-type wavelength domain switch | Hiroshi Ishikawa, Toshifumi Hasama, Hitoshi Kawashima, Masahiko Mori, Hisato Uetsuka +2 more | 2012-07-24 |
| 6514576 | Method of manufacturing a diffraction grating | Junji Nishii, Noboru Tohge | 2003-02-04 |