Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7043032 | Tone-control circuit and method for conditioning respective frequency bands of an audio signal | Philip R. Jeffs | 2006-05-09 |
| 5046105 | Audio signal equalizer having accelerated slope phase shift compensated filters | — | 1991-09-03 |
| 4891841 | Reciprocal, subtractive, audio spectrum equalizer | — | 1990-01-02 |