Issued Patents 2018
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10099894 | Active damping of a hovering elevator car based on vertical oscillation of the hovering elevator car | Randall Keith Roberts, Amir Lotfi | 2018-10-16 |
| 10059563 | Elevator car speed control in a battery powered elevator system | — | 2018-08-28 |
| 10008917 | Bus capacitor bank configuration for a multi-level regenerative drive | Steven M. Millett, Shashank Krishnamurthy, Yang Wang | 2018-06-26 |
| 9957131 | Elevator speed control | Edward Piedra | 2018-05-01 |
| 9906183 | Parallel interleaved 2-level or 3-level regenerative drives | — | 2018-02-27 |