Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8043070 | Speed control | Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Daniel J. Hruby, Kevin Murphy +4 more | 2011-10-25 |
| 8019479 | Control algorithm of variable speed pumping system | Lars Hoffmann Berthelsen, Ronald B. Robol, Christopher R. Yahnker, Everett Cox, Donald Steen +10 more | 2011-09-13 |
| 7874808 | Variable speed pumping system and method | — | 2011-01-25 |