Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9040289 | Gravity assisted compost reactor | Don V. Mathsen, Rodney J. Kleven, Evan P. Andrist | 2015-05-26 |
| 8048668 | System and method of aeration for compost processes | Don V. Mathsen, Rodney J. Kleven | 2011-11-01 |