Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5388151 | Technique for reducing message notification blockage in voice mail systems | Zafar M. Khalid, Brian M. Tennant | 1995-02-07 |
| 5175761 | Call transfers by voice messaging system (VMS) integrated to a private branch exchange | Zafar M. Khalid, Joseph F. Khouri | 1992-12-29 |