Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D403414 | Cylindrical pleated air filter with top and sidewall filtering areas | Nathan E. Shelton | 1998-12-29 |
| D403416 | Air filter with top filtering area and tapered sidewall filtering area | Nathan E. Shelton | 1998-12-29 |
| D401942 | Filter cover | Nathan E. Shelton | 1998-12-01 |
| D401597 | Shallow cylindrical air filter with top and side filtering areas | Nathan E. Shelton | 1998-11-24 |
| D401684 | Air Filter | Nathan E. Shelton | 1998-11-24 |