Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7520347 | Stair chair with an adjustable glide track resistance and braking device | Timothy J. Dietz, Steven B. Schrand | 2009-04-21 |
| D519064 | Stair chair | Steven B. Schrand, Donald Bierman, Timothy J. Dietz | 2006-04-18 |