Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5293452 | Voice log-in using spoken name input | Barbara J. Wheatley | 1994-03-08 |
| 5212730 | Voice recognition of proper names using text-derived recognition models | Barbara J. Wheatley | 1993-05-18 |
| 4984178 | Chart parser for stochastic unification grammar | Charles T. Hemphill | 1991-01-08 |
| 4914692 | Automatic speech recognition using echo cancellation | Walter T. Hartwell, Mark A. Johnson | 1990-04-03 |
| 4912764 | Digital speech coder with different excitation types | Walter T. Hartwell, Dimitrios P. Prezas | 1990-03-27 |
| 4879748 | Parallel processing pitch detector | Dimitrios P. Prezas | 1989-11-07 |
| 4815134 | Very low rate speech encoder and decoder | George R. Doddington | 1989-03-21 |