Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11165501 | Excitation light source apparatus and optical transmission system | Katsunori Imanishi, Toshiyuki Tokura, Shun Chikamori | 2021-11-02 |
| 11128380 | Signal light interruption detection device, optical amplifier, optical wavelength multiplex transmission device, and optical wavelength multiplex transmission system | Kanehiro Matsumoto, Toshiyuki Tokura, Shun Chikamori | 2021-09-21 |
| 10708676 | Optical transmission line switching apparatus, optical transmission system, and transmission line switching method | Shun Chikamori, Katsunori Imanishi, Toshiyuki Tokura | 2020-07-07 |
| 9831953 | Excitation light source device and optical transmission system | Katsunori Imanishi, Toshiyuki Tokura, Hideki Sueoka | 2017-11-28 |
| 6873209 | Input buffer circuit having function of canceling offset voltage | Tsutomu Yoshimura, Harufusa Kondo, Hironobu Ito | 2005-03-29 |