Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D439720 | Wheel chock for a grocery cart | Dennis Graham | 2001-03-27 |
| 6028947 | Lightweight molded waveguide device with support infrastructure | Alexander Faraone | 2000-02-22 |
| 5702598 | Magnetic filter | Kenneth Walthall | 1997-12-30 |
| 4862508 | Method for large-scale multiple source sound reinforcement | — | 1989-08-29 |
| 4811403 | Ultralight loudspeaker enclosures | Clifford A. Henricksen | 1989-03-07 |