Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1081737 | Hammer mill spacer and lock collar holder | — | 2025-07-01 |
| 8342435 | Hammer mill hammer | Chad J. Plumb, Ron R. Ronfeldt, Christine D. Petersen, Robert H. Knox | 2013-01-01 |
| 8104177 | Hammer mill hammer | Chad J. Plumb, Ron R. Ronfeldt, Christine D. Petersen, Robert H. Knox | 2012-01-31 |
| 7419109 | Apparatus for attaching hammers to a hammer mill | Ron R. Ronfeldt, Christine D. Petersen | 2008-09-02 |