Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9369817 | Broad sound field loudspeaker system | Donald J. North, Thomas Richard Farr | 2016-06-14 |
| 7142685 | Adjustable loudspeaker | — | 2006-11-28 |
| 5457749 | Electronic muffler | John A. Cain, David A. Dye | 1995-10-10 |
| 5272286 | Single cavity automobile muffler | John Cain, David A. Dye | 1993-12-21 |
| 5133017 | Noise suppression system | John Cain, Jamie Chait, David A. Dye | 1992-07-21 |