Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9756189 | Method and system for routing and security for telephone calls over a packet-switched network | Saswata Bhattacharya, Mahendra Pratap, Quan Li, Serafim Maroulis | 2017-09-05 |
| 8982875 | Method and system for routing and security for telephone calls over a packet-switched network | Saswata Bhattacharya, Mahendra Pratap, Quan Li, Serafim Maroulis | 2015-03-17 |
| 8254371 | Method and system for routing and security for telephone calls over a packet-switched network | Saswata Bhattacharya, Mahendra Pratap, Quan Li, Serafim Maroulis | 2012-08-28 |
| 6353610 | Method and system for call signaling in telephone calls over a packet-switched network | Saswata Bhattacharya, Mahendra Pratap, Tript P. Singh, Quan Li, Ghassan Z. Qadah +1 more | 2002-03-05 |
| 5327487 | Facsimile apparatus and method for use with customer switching system | Sanford Brown, Mark A. Crandall | 1994-07-05 |