Issued Patents All Time
Showing 1–17 of 17 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7280664 | Method for apparatus for audio matrix decoding | Stephen Decker Vernon, Robert Andersen | 2007-10-09 |
| 6970567 | Method and apparatus for deriving at least one audio signal from two or more input audio signals | Kenneth James Gundry | 2005-11-29 |
| 6920223 | Method for deriving at least three audio signals from two input audio signals | — | 2005-07-19 |
| 5666424 | Six-axis surround sound processor with automatic balancing and calibration | Samuel John Wolfe | 1997-09-09 |
| 5644640 | Surround sound processor with improved control voltage generator | — | 1997-07-01 |
| 5625696 | Six-axis surround sound processor with improved matrix and cancellation control | — | 1997-04-29 |
| 5504819 | Surround sound processor with improved control voltage generator | — | 1996-04-02 |
| 5428687 | Control voltage generator multiplier and one-shot for integrated surround sound processor | Martin E. G. Willcocks | 1995-06-27 |
| 5339363 | Apparatus for enhancing monophonic audio signals using phase shifters | — | 1994-08-16 |
| 5307415 | Surround processor with antiphase blending and panorama control circuitry | — | 1994-04-26 |
| 5301237 | Surround sound loudspeakers | — | 1994-04-05 |
| 5295189 | Control voltage generator for surround sound processor | — | 1994-03-15 |
| 5280528 | Band pass filter circuit for rear channel filtering in a surround processor | — | 1994-01-18 |
| 5263087 | Time constant processing circuit for surround processor | — | 1993-11-16 |
| 5199075 | Surround sound loudspeakers and processor | — | 1993-03-30 |
| 5172415 | Surround processor | — | 1992-12-15 |
| 4932059 | Variable matrix decoder for periphonic reproduction of sound | — | 1990-06-05 |