Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9106767 | Systems and methods for information exchange and synchronization using DTMF over telephone communication channels | G. Alagiri, Vinod Nagarajan, Rajah Kalipatnapu, Darrell Fongson | 2015-08-11 |
| 8098801 | Systems and methods for information exchange and synchronization using DTMF over telephone communication channels | G. Alagiri, Vinod Nagarajan, Rajah Kalipatnapu, Darrell Fongson | 2012-01-17 |
| 7088804 | Systems and methods for information exchange and synchronization using DTMF over telephone communication channels | Vinod Nagarajan, Rajah Kalipatnapu, Darrell Fongson | 2006-08-08 |
| 6771751 | Systems and methods for information exchange and synchronization using DTMF over telephone communication channels | G. Alagiri, Vinod Nagarajan, Rajah Kalipatnapu, Darrell Fongson | 2004-08-03 |