Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6570087 | Delta magnetic de-fluxing for low noise signal cables | Richard L. Clark | 2003-05-27 |
| 5928160 | Home hearing test system and method | Richard L. Clark, Charles Watson, Diane Kewley-Port, Howard Hoyt, Carl V. Miller | 1999-07-27 |
| 5469509 | Car audio system with high signal output | Richard L. Clark | 1995-11-21 |