Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10850162 | Interactive apparatus and methods for muscle strengthening | Derk Hartland, Todd Putnam | 2020-12-01 |
| 10118073 | Interactive apparatus and methods for muscle strengthening | Derk Hartland, Todd Putnam | 2018-11-06 |
| 8276693 | Powertrain, vehicle, and method with electric motors and dual belt drive | Joseph Scarbo, Derk Hartland, Neil E. Hannemann | 2012-10-02 |