Issued Patents 2022
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11332344 | Elevator car frame assembly | Richard J. Ericson, Loi Cheng, Bruce P. Swaybill | 2022-05-17 |
| 11214464 | Elevator seismic performance apparatus | Richard J. Ericson, Bruce P. Swaybill, Loi Cheng | 2022-01-04 |