Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D1020743 | Base station | Philip C. Dretzka, Aaron Curtis, Daniel A. Phipps, Chris A. Wadzinski, Ryan J. Volovsek | 2024-04-02 |
| D921053 | Snowthrower | Ryan J. Volovsek, Philip C. Dretzka, Christina O. Howell, Brian M. Clemens | 2021-06-01 |
| 9863107 | Rotor and rotor housing for a snowthrower | Nathan J. Friberg, Philip G. Stalpes, Derek S. Duchscherer | 2018-01-09 |
| 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 |