Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7587215 | User interface for cellular telephone group calls | Sumanta Chakraborty, Utpal Das, Harpreet Singh | 2009-09-08 |
| 7403767 | Cellular telephone network with record keeping for missed calls | Nematolah Kashanian, Sima Ybarra, Anand Desikan, Utpal Das | 2008-07-22 |