Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9004598 | Seating system for a recumbent stepper | Matthew P. Weber, Douglas R. Hennigar, Karl G. Sponsler | 2015-04-14 |
| 7775942 | Recumbent stepper apparatus | Mark D. Hildebrandt, Douglas R. Hennigar, Matthew P. Weber, Stephen Telesco, Brian Kurowicki | 2010-08-17 |
| 7540830 | Leg stabilization device | Mark D. Hildebrandt, Douglas R. Hennigar | 2009-06-02 |
| 7490363 | Hand harness for exercise equipment | Mark D. Hildebrandt, Douglas R. Hennigar | 2009-02-17 |