Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7506463 | Universal electronic gaming machine topper sign | — | 2009-03-24 |
| 7431476 | Cold cathode fluorescent lamp | — | 2008-10-07 |
| 4851836 | Audio-tactile pedestrian push button signalling system | Barry Wilkinson | 1989-07-25 |
| 4785385 | Traffic light lens | — | 1988-11-15 |