Issued Patents 2021
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11198589 | Elevator system including a protective hoistway liner assembly | George Scott Copeland, Richard K. Pulling, Randy Roberts | 2021-12-14 |
| 11130655 | Elevator car dynamic sag damping system | Randall S. Dube | 2021-09-28 |