Issued Patents All Time
Showing 1–25 of 26 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10818281 | Digital circuit arrangements for ambient noise-reduction | — | 2020-10-27 |
| 10431198 | Noise cancellation system with lower rate emulation | Anthony James Magrath | 2019-10-01 |
| 10319361 | Digital circuit arrangements for ambient noise-reduction | — | 2019-06-11 |
| 10147413 | Noise cancellation system with lower rate emulation | Anthony James Magrath | 2018-12-04 |
| 9654871 | Noise cancellation system with lower rate emulation | Anthony James Magrath | 2017-05-16 |
| 9558729 | Digital circuit arrangements for ambient noise-reduction | — | 2017-01-31 |
| 9430999 | Noise cancellation | — | 2016-08-30 |
| 9224382 | Noise cancellation | — | 2015-12-29 |
| 8908876 | Noise cancellation system with lower rate emulation | Anthony James Magrath | 2014-12-09 |
| 8670571 | Frequency control based on device properties | — | 2014-03-11 |
| 8645444 | IIR filter for reducing the complexity of multiplying elements | Anthony James Magrath | 2014-02-04 |
| 8644523 | Digital circuit arrangements for ambient noise-reduction | — | 2014-02-04 |
| 8165312 | Digital circuit arrangements for ambient noise-reduction | — | 2012-04-24 |
| 7197151 | Method of improving 3D sound reproduction | Alastair Sibbald, Fawad Nackvi | 2007-03-27 |
| 7167567 | Method of processing an audio signal | Alastair Sibbald, Fawad Nackvi | 2007-01-23 |
| 6795556 | Method of modifying one or more original head related transfer functions | Alastair Sibbald, Michael Andrew Percy | 2004-09-21 |
| 6643375 | Method of processing a plural channel audio signal | Adam Rupert Philp, Alastair Sibbald, Fawad Nackvi | 2003-11-04 |
| 6614910 | Stereo sound expander | Alastair Sibbald | 2003-09-02 |
| 6577736 | Method of synthesizing a three dimensional sound-field | — | 2003-06-10 |
| 6208687 | Filter switching method | — | 2001-03-27 |
| 5917916 | Audio reproduction systems | Alastair Sibbald | 1999-06-29 |
| 5751815 | Apparatus for audio signal stereophonic adjustment | Adam Rupert Philp, Alastair Sibbald, Fawad Nackvi | 1998-05-12 |
| 5666425 | Plural-channel sound processing | Alastair Sibbald, Adam Rupert Philp, Fawad Nackvi, Adrian Miles Sandford | 1997-09-09 |
| 5623431 | Aligning a given signal with a corresponding reference signal | — | 1997-04-22 |
| 5600727 | Determination of position | Alastair Sibbald | 1997-02-04 |