Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10588700 | Distortion suppression in electromagnetic tracking systems | Raju Viswanathan | 2020-03-17 |
| 5848172 | Directional microphone | John Charles Baumhauer, Jr., James E. West | 1998-12-08 |
| 5737389 | Technique for determining a compression ratio for use in processing audio signals within a telecommunications system | — | 1998-04-07 |
| 5699479 | Tonality for perceptual audio compression based on loudness uncertainty | Sean M. Dorward, James David Johnston, Mark Sydorenko | 1997-12-16 |
| 5682463 | Perceptual audio compression based on loudness uncertainty | Deepen Sinha, Mark Sydorenko | 1997-10-28 |
| 5553134 | Background noise compensation in a telephone set | Donald Joseph Youtkus | 1996-09-03 |
| 5539806 | Method for customer selection of telephone sound enhancement | John C. Songrady | 1996-07-23 |
| 5526419 | Background noise compensation in a telephone set | Donald Joseph Youtkus | 1996-06-11 |
| 5524148 | Background noise compensation in a telephone network | Donald Joseph Youtkus | 1996-06-04 |
| 5485515 | Background noise compensation in a telephone network | Donald Joseph Youtkus | 1996-01-16 |
| 4442540 | Data over voice transmission arrangement | — | 1984-04-10 |
| 4417102 | Noise and bit rate reduction arrangements | — | 1983-11-22 |