Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6219426 | Center point stereo field expander for amplified musical instruments | Richard Aspen Pittman | 2001-04-17 |
| D364167 | Speaker motor case | — | 1995-11-14 |
| 5418860 | Voice coil excursion and amplitude gain control device | — | 1995-05-23 |
| 5398992 | Seat having sound system with acoustic waveguide | — | 1995-03-21 |