Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6144857 | Cellular communications systems | David Price | 2000-11-07 |
| 6138017 | Cellular communications system | David Price, Ricky Kaura | 2000-10-24 |
| 5027345 | Digital key telephone system | Timothy J. Littlewood, David Joseph Robertson, Alan Stanley John Chapman, Terence Neil Thomas, Nadir Nizamuddin | 1991-06-25 |
| 4893310 | Digital key telephone system | David Joseph Robertson, Alan Stanley John Chapman, Terence Neil Thomas, Nadir Nizamuddin, John W. Williams +2 more | 1990-01-09 |
| 4873682 | Digital key telephone system | George F. Irwin, Paul J. Smelters, David Joseph Robertson | 1989-10-10 |