Issued Patents 2005
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6978955 | Mill box for materials grinder | Frederick H. Lucas, Duane Harthoorn | 2005-12-27 |
| 6843435 | Mill box for materials grinder | Frederick H. Lucas, Duane Harthoorn | 2005-01-18 |
| 6840471 | Rotary grinder apparatus and method | Keith Roozeboom, Duane R. De Boef | 2005-01-11 |