Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4979094 | Control system | David James Gemmell | 1990-12-18 |
| 4383254 | Control apparatus for a display matrix | David James Gemmell, Anthony Longley | 1983-05-10 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4979094 | Control system | David James Gemmell | 1990-12-18 |
| 4383254 | Control apparatus for a display matrix | David James Gemmell, Anthony Longley | 1983-05-10 |