Issued Patents All Time
Showing 26–27 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4489442 | Sound actuated microphone system | Carl R. Anderson, William R. Bevan, Alan Smith | 1984-12-18 |
| 4194590 | Loudspeaker horn with adjustable angle of dispersion | C. Roger Anderson | 1980-03-25 |