Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4413253 | Miniature sounder with double tuned cavity | Alan Hofer | 1983-11-01 |
| 4409588 | Miniature sounder with multi-part tuned cavities | Alan Hofer | 1983-10-11 |
| 4251807 | Miniature buzzer | Alan Hofer | 1981-02-17 |