Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6581780 | Automatic gradation unit | Michael E. Barrett, Gary Heeszel, David F. Peaks | 2003-06-24 |
| 6575303 | Processing a product including aggregate materials and a volatile component | J. Donald Brock, Michael E. Barrett, R. Ronald Collins, Gary Heeszel, David F. Peaks | 2003-06-10 |