Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7103188 | Variable gain active noise cancelling system with improved residual noise sensing | — | 2006-09-05 |
| 6118878 | Variable gain active noise canceling system with improved residual noise sensing | — | 2000-09-12 |
| 6069959 | Active headset | — | 2000-05-30 |
| 5841876 | Hybrid analog/digital vibration control system | Carl Steven Gifford, Michael C. J. Trinder | 1998-11-24 |
| 5676353 | Hydraulic lever actuator | Michael C. J. Trinder | 1997-10-14 |
| 5649018 | Hybrid analog/digital vibration control | Carl Steven Gifford, Michael C. J. Trinder | 1997-07-15 |
| 5638454 | Noise reduction system | Michael C. J. Trinder | 1997-06-10 |
| 5619020 | Muffler | Michael C. J. Trinder | 1997-04-08 |
| 5452361 | Reduced VLF overload susceptibility active noise cancellation headset | — | 1995-09-19 |
| 5361304 | Headphone assemblies | Michael C. J. Trinder | 1994-11-01 |
| 4527282 | Method and apparatus for low frequency active attenuation | George B. B. Chaplin, Andrew Jones | 1985-07-02 |