Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6980705 | Optical waveguide device | Hirotoshi Nagata, Toshihiro Sakamoto | 2005-12-27 |
| 6956980 | Optical waveguide type optical modulator and production method therefor | Hirotoshi Nagata, Futoshi Yamamoto, Takashi Shinriki, Ryo Shimizu | 2005-10-18 |
| 6806113 | Optical waveguide device and method for forming optical waveguide device | Hirotoshi Nagata, Toshihiro Sakamoto, Tetsuya Fujino | 2004-10-19 |
| 6583480 | Electro-optical element having protective film on top and side surfaces of buffer layer | Hirotoshi Nagata | 2003-06-24 |
| 6522792 | Light modulator of waveguide type | Tohru Sugamata, Yoshihiro Hashimoto | 2003-02-18 |
| 5748358 | Optical modulator with optical waveguide and traveling-wave type electrodes | Tohru Sugamata, Takashi Shinriki | 1998-05-05 |