Issued Patents All Time
Showing 1–25 of 32 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9296448 | Combined back support and boarding ladder for an inflatable boat | — | 2016-03-29 |
| 8869730 | Back support for an inflatable boat | — | 2014-10-28 |
| 8067683 | Method and apparatus for electronically sustaining a note from a musical instrument | Timothy E. Meeks | 2011-11-29 |
| 6594365 | Acoustic system identification using acoustic masking | — | 2003-07-15 |
| 6478110 | Vibration excited sound absorber | Ralph Busch | 2002-11-12 |
| 6215884 | Piezo speaker for improved passenger cabin audio system | Michael J. Parrella, Steven L. Machacek | 2001-04-10 |
| 6208949 | Method and apparatus for dynamical system analysis | — | 2001-03-27 |
| 6181797 | Piezo speaker for improved passenger cabin audio systems | Michael J. Parrella, Steven L. Machacek | 2001-01-30 |
| 5901231 | Piezo speaker for improved passenger cabin audio systems | Michael J. Parrella, Steven L. Machacek | 1999-05-04 |
| 5828768 | Multimedia personal computer with active noise reduction and piezo speakers | Michael McLoughlin, Stephen Hildebrand, William Kokonaski, James W. Hiney | 1998-10-27 |
| 5812682 | Active vibration control system with multiple inputs | Colin F. Ross | 1998-09-22 |
| 5768473 | Adaptive speech filter | Kenneth P. Davis | 1998-06-16 |
| 5745581 | Tracking filter for periodic signals | Yong Yan | 1998-04-28 |
| 5742694 | Noise reduction filter | — | 1998-04-21 |
| 5652799 | Noise reducing system | Colin F. Ross, Andrew J. Langley | 1997-07-29 |
| 5652770 | Sampled-data filter with low delay | — | 1997-07-29 |
| 5638022 | Control system for periodic disturbances | — | 1997-06-10 |
| 5553153 | Method and system for on-line system identification | — | 1996-09-03 |
| 5481615 | Audio reproduction system | Andrew J. Langley | 1996-01-02 |
| 5475761 | Adaptive feedforward and feedback control system | — | 1995-12-12 |
| 5469087 | Control system using harmonic filters | — | 1995-11-21 |
| 5431008 | Active control of machine performance | Colin F. Ross, Andrew J. Langley | 1995-07-11 |
| 5418857 | Active control system for noise shaping | — | 1995-05-23 |
| 5365594 | Active sound and/or vibration control | Colin F. Ross | 1994-11-15 |
| 5361303 | Frequency domain adaptive control system | — | 1994-11-01 |