Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9147292 | RF-link margin measurement method and system | — | 2015-09-29 |
| 7813699 | Transceiver redundancy in an electronic toll collection system | Thua Van Ho, Roger Shun Hong Tong, Wai-Cheung Tang, Japjeev Kohli | 2010-10-12 |
| 7479896 | Adaptive channel bandwidth in an electronic toll collection system | Thua Van Ho | 2009-01-20 |
| 7408480 | Dual mode electronic toll collection transponder | Henry Sun Yee Woo, Wai-Cheung Tang, Paul Manuel, Weimin He, Roger Shun Hong Tong | 2008-08-05 |
| 7385525 | Dynamic timing adjustment in an electronic toll collection system | Thua Van Ho, Roger Shun Hong Tong, Wal-Cheung Tang, Martin Capper | 2008-06-10 |
| 6219613 | Vehicle position determination system and method | Robert W. Tiernay | 2001-04-17 |
| 6191705 | Radio frequency highway management system | Peter Oomen, James Kenneth Cook | 2001-02-20 |