Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8897638 | Optical packet switching system | Koshi Kitajima, Wataru Kawasaki | 2014-11-25 |
| 6469823 | Optical wavelength converter and optical wavelength division multiplexing communication system using the same | Hideyuki Kikuchi, Sunao Itou | 2002-10-22 |