Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6289726 | Fuel filter gauge | Gregory Matthew Ferris, Charels Henry Berry, III, Michael Dean Metcalf, Laverne Lee Sidler | 2001-09-18 |
| 5774056 | Gauge for monitoring air filters | Charles Henry Berry, III, Thomas Alan Stoll, Gregory Matthew Ferris, James Nathan Forry | 1998-06-30 |