Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7046872 | Optical switch, optical add-drop module, and optical communication system | Ken Sakuma, Daigo Fujita, Koji Omichi, Hideyuki Hosoya | 2006-05-16 |
| 7046881 | Manufacturing method for optical coupler/splitter and method for adjusting optical characteristics of planar lightwave circuit device | Ken Sakuma, Shimon Ishikawa, Tomoko Shikata, Hideyuki Hosoya, Akira Wada | 2006-05-16 |
| 6690852 | Optical multiplexer/demultiplexer | Katsutoshi Kohmoto, Kouji Ohura, Kenichiro Asano, Hideyuki Hosoya | 2004-02-10 |