Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5887068 | Multi-driver in-phase bipolar array loudspeaker | Robert G. Johnston, Jr. | 1999-03-23 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5887068 | Multi-driver in-phase bipolar array loudspeaker | Robert G. Johnston, Jr. | 1999-03-23 |