Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7938755 | Adjustable exercise device | David E. Dyer, Donald A. Demuth, Mark Sand, Rodney P. West | 2011-05-10 |
| 7156777 | Adjustable exercise device | David E. Dyer, Donald A. Demuth, Mark Sand, Rodney P. West | 2007-01-02 |
| 6589138 | Treadmill cushion | David E. Dyer, Chris Klemczyk | 2003-07-08 |