Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4831663 | Digital signal transmission/reception using differential polarization modulation/demondulation | — | 1989-05-16 |
| 4817207 | Optical communication system utilizing phase modulation | Roderick P. Webb | 1989-03-28 |
| 4807953 | Apparatus and method for frequency locking electromagnetic optical signals | David Cotter, Richard Wyatt | 1989-02-28 |