Issued Patents 2017
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D786940 | Snowthrower power head | Philip C. Dretzka, David J. Martin, Nathan J. Friberg, Derek S. Duchscherer | 2017-05-16 |
| 9556572 | Self-propelled, single-stage snowthrower | Derek S. Duchscherer, Philip G. Stalpes, Nathan J. Friberg | 2017-01-31 |
| 9546462 | Rotor and rotor housing for a snowthrower | Nathan J. Friberg, Philip G. Stalpes, Derek S. Duchscherer | 2017-01-17 |