Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7424119 | Voice matching system for audio transducers | — | 2008-09-09 |
| 4888807 | Variable pattern microphone system | — | 1989-12-19 |
| 4712093 | Audible audio level indicator | Steve Hebrock | 1987-12-08 |
| D292702 | Speaker | Jeffrey N. White | 1987-11-10 |
| 4691349 | Duplex microphone communication system | Steve Hebrock | 1987-09-01 |
| 4574906 | Outdoor speaker | Jeffrey N. White | 1986-03-11 |
| 4571717 | Adapter for a plug-in cartridge | Frederick W. Nichols, III, Norm Levenstein | 1986-02-18 |