Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8944178 | Tongue pulled spreader and grader with auxiliary electric motor for lowering or raising wheels | — | 2015-02-03 |
| 8544558 | Tongue pulled spreader and grader system | — | 2013-10-01 |
| 8393406 | Spreader/grader system | — | 2013-03-12 |
| 5332331 | Combination spreader/grader apparatus | Barry L. Critz | 1994-07-26 |