Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6157025 | Disk shaped tunable optical filter | Yoshitada Katagiri, Shinji Nagaoka, Fumikazu Ohira, Kazuo Aida, Ken Suzuki +3 more | 2000-12-05 |
| 5905823 | Polarization independent optical nonreciprocal circuit based on even mode to odd mode conversion | Toshihiro Shintaku, Yujiro Katoh, Naoto Sugimoto, Haruki Kozawaguchi | 1999-05-18 |
| 5414548 | Arrayed-wave guide grating multi/demultiplexer with loop-back optical paths | Masao Kawachi, Hiroshi Takahashi, Kyo Inoue | 1995-05-09 |