Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12284159 | Secure communication system | David J. Sullivan, Benjamin Mark Lee | 2025-04-22 |
| 9497233 | Application of a non-secure warning tone to a packetised voice signal | Robert John Salter | 2016-11-15 |
| 8666039 | Voice traffic gateway | Robert John Salter | 2014-03-04 |
| 8619556 | Call control | Stuart Wray, Clive Ellis Jones, Robert John Salter | 2013-12-31 |
| 8243738 | Or relating to call control | Stuart Wray, Clive Ellis Jones, Robert John Salter | 2012-08-14 |
| 7978834 | Call control | Stuart Wray, Clive Ellis Jones, Robert John Salter | 2011-07-12 |