Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7441719 | Mill box for materials grinder | Gary Verhoef, Duane Harthoorn | 2008-10-28 |
| 6978955 | Mill box for materials grinder | Gary Verhoef, Duane Harthoorn | 2005-12-27 |
| 6843435 | Mill box for materials grinder | Gary Verhoef, Duane Harthoorn | 2005-01-18 |