Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10225408 | Method and apparatus for managing voicemail in a communication session | Thomas A. Gray | 2019-03-05 |
| 9860383 | Method and apparatus for managing voicemail in a communication session | John Albert, Kavita Jain, Liang Zhou, Thomas A. Gray | 2018-01-02 |
| 9413585 | Network telephony appliance and system for inter/intranet telephony | Henning Schulzrinne | 2016-08-09 |
| 9270932 | Video call set up in an established audio call | — | 2016-02-23 |
| 8681948 | Method and apparatus for managing voicemail in a communication session | John Albert, Kavita Jain, Liang Zhou, Thomas A. Gray | 2014-03-25 |
| 8271660 | Network telephony appliance and system for inter/intranet telephony | Henning Schulzrinne | 2012-09-18 |
| 7610384 | Network telephony appliance and system for inter/intranet telephony | Henning Schulzrinne | 2009-10-27 |