Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9573605 | Continuous assist zipline braking and control system | David E. Udow, Robert L. Steele | 2017-02-21 |
| 8708109 | Continuous assist zipline braking and control system | David E. Udow, Robert L. Steele | 2014-04-29 |
| 7381137 | Zipline braking and motion-arrest system | Robert L. Steele, David E. Udow | 2008-06-03 |