Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9409366 | Compactor and compacting method for a loose lightweight material | Preston Wayne Schmidt, Amos Troy Dirks | 2016-08-09 |
| 8707542 | Rotary foam insulation cutter | Preston Wayne Schmidt | 2014-04-29 |
| 6203086 | Tool box and top cover for truck box | Les H. Dirks | 2001-03-20 |
| D398282 | Pickup bed cover | — | 1998-09-15 |
| 4237951 | Industrial tire chain tightener | — | 1980-12-09 |