Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8157432 | Method of mixing a fluid in a tank with a draft tube mixing system | Greg A. Larson, Donald N. Ruehrwein | 2012-04-17 |
| 7748891 | Liquid storage tank with draft tube mixing system | Greg A. Larson, Donald N. Ruehrwein | 2010-07-06 |
| 6318034 | Elevated storage tank | Bryant A. Zavitz, William J. Czaska, Steven R. Brock | 2001-11-20 |