Issued Patents 2022
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11524873 | Ropeless elevator wheel force releasing system | Randy Roberts, Kiron Bhaskar, Brad Guilani | 2022-12-13 |
| 11377323 | Retrofitting an elevator machine with primary and secondary braking | Daniel B. Davis, III, Robert K. Williams, John Eschenbrenner, Gregory M. O'Seep, James L. Hubbard +5 more | 2022-07-05 |
| 11332344 | Elevator car frame assembly | Richard J. Ericson, Meghan Mastriano, Loi Cheng | 2022-05-17 |
| 11299374 | Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine | Daniel B. Davis, III, Robert K. Williams, John Eschenbrenner, Gregory M. O'Seep, James L. Hubbard +5 more | 2022-04-12 |
| 11214464 | Elevator seismic performance apparatus | Richard J. Ericson, Meghan Mastriano, Loi Cheng | 2022-01-04 |