Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5238462 | Stair climbing exercise apparatus utilizing drive belts | Michael Kenneth Platt, David J. Thum | 1993-08-24 |
| 5135447 | Exercise apparatus for simulating stair climbing | Chester F. Robards, Jr., Stephen A. Waltasti, Robert Kohan, Donald J. Alexander, Douglas G. Guenther +2 more | 1992-08-04 |