Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8971677 | Optical 90-degree hybrid circuit | Yohei Sakamaki, Toshikazu Hashimoto, Yusuke Nasu, Hiroshi Takahashi | 2015-03-03 |
| 8649640 | Optical 90-degree hybrid circuit | Yohei Sakamaki, Yusuke Nasu, Toshikazu Hashimoto, Hiroshi Takahashi | 2014-02-11 |
| 8588560 | Optical 90-degree hybrid circuit | Yohei Sakamaki, Takashi Goh, Toshikazu Hashimoto, Yusuke Nasu, Hiroshi Takahashi | 2013-11-19 |
| 8150219 | Waveguide-type optical interferometer | Yusuke Nasu, Manabu Oguma, Yasuaki Hashizume, Yasuyuki Inoue, Hiroshi Takahashi +2 more | 2012-04-03 |
| 7899279 | Optical delay line interferometer | Yusuke Nasu, Toshikazu Hashimoto, Yohei Sakamaki, Hiroshi Takahashi, Yasuyuki Inoue | 2011-03-01 |
| 6304687 | Optical waveguide circuit, its manufacturing method and optical waveguide module having the optical waveguide circuit | Yasuyuki Inoue, Akimasa Kaneko, Hiroshi Takahashi, Fumiaki Hanawa, Kenji Yokoyama +9 more | 2001-10-16 |