Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4392121 | Receiver for A.C. electrical supply signalling arrangement | Charles G. Leedham | 1983-07-05 |
| 4254403 | Systems for transmitting information in an alternating current electricity supply system | Leonardo Perez-Cavero, Michael W. Cross, Geoffrey Fielding | 1981-03-03 |