Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9849321 | Concealed sprinkler activation | Arto Huotari, Bryan Robert Siewert, Michael Kenneth Krager, Enrico Manes, Brian J. Stumm | 2017-12-26 |
| 7621379 | Elevator assembly with extendable sill | Robin Mihekun Miller | 2009-11-24 |
| 6685003 | Pulse-free escalator | George Scott Copeland, Richard N. Fargo, Robert Hammell | 2004-02-03 |