Issued Patents 2011
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7970290 | Digital phase estimator, digital phase locked loop and optical coherent receiver | Zhenning Tao, Lei Li | 2011-06-28 |
| 7953328 | Optical DQPSK transmitter phase monitor and control | Zhenning Tao | 2011-05-31 |
| 7933522 | Optical signal transmission system and optical signal transmission method | Akihiko Isomura | 2011-04-26 |
| 7877025 | Phase monitor apparatus, phase control apparatus and methods thereof for optical DQPSK receiver | Zhenning Tao, Akihiko Isomura | 2011-01-25 |