Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4384173 | Electromagnetic planar diaphragm transducer | Dennis K. Briefer, Richard Ian Silverman | 1983-05-17 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4384173 | Electromagnetic planar diaphragm transducer | Dennis K. Briefer, Richard Ian Silverman | 1983-05-17 |