Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8387753 | Ergonomic extendable/retractable ladder | Mitchell I. Kieffer, Craig S. Aizman, Michael J. Kelly, Wayne A. Shakal | 2013-03-05 |
| D593685 | Telescoping ladder rung | Mitchell I. Kieffer, Craig S. Aizman, Micheal J. Kelly, Wayne A. Shakal | 2009-06-02 |