Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9669689 | Folding cargo bay cover for pickup truck | Charles J. Steffens, Douglas C. Steffens | 2017-06-06 |
| 8205928 | Folding cargo bay cover for pickup truck | Charles J. Steffens, Douglas C. Steffens | 2012-06-26 |
| 7735881 | Folding cargo bay cover for pickup truck | Charles J. Steffens, Douglas C. Steffens | 2010-06-15 |