Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8588560 | Optical 90-degree hybrid circuit | Yohei Sakamaki, Takashi Goh, Toshikazu Hashimoto, Kuninori Hattori, Hiroshi Takahashi | 2013-11-19 |
| 8150219 | Waveguide-type optical interferometer | Manabu Oguma, Yasuaki Hashizume, Yasuyuki Inoue, Hiroshi Takahashi, Kuninori Hattori +2 more | 2012-04-03 |
| 7899279 | Optical delay line interferometer | Kuninori Hattori, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi, Yasuyuki Inoue | 2011-03-01 |
| 6973237 | Method of producing optical fiber grating and production device therefor | Shinji Yamashita | 2005-12-06 |