Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9167090 | Public safety answering point language detection | Jon Louis Bentley, Mark J. Fletcher, Avram Levi, Paul Roller Michaelis, Heinz Teutsch | 2015-10-20 |
| 8817952 | Method, apparatus, and system for providing real-time PSAP call analysis | Jon Louis Bentley, Mark J. Fletcher, Avram Levi, Paul Roller Michaelis, Heinz Teutsch | 2014-08-26 |
| 5828756 | Stereophonic acoustic echo cancellation using non-linear transformations | Jacob Benesty, Dennis R. Morgan, Man M. Sondhi | 1998-10-27 |
| 5535300 | Perceptual coding of audio signals using entropy coding and/or multiple power spectra | James David Johnston | 1996-07-09 |
| 5341457 | Perceptual coding of audio signals | James David Johnston | 1994-08-23 |