Issued Patents 2020
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10737908 | Method and kit for retrofitting elevator machines with thrust bearing, and retrofitted elevator machine | Robert K. Williams, John Eschenbrenner, Gregory M. O'Seep, James L. Hubbard, Martin J. Hardesty +5 more | 2020-08-11 |
| 10625984 | Counterweight for elevator system | Bruce St. Pierre, Bruce P. Swaybill | 2020-04-21 |
| 10618775 | Retrofitting an elevator machine with primary and secondary braking | Robert K. Williams, John Eschenbrenner, Gregory M. O'Seep, James L. Hubbard, Martin J. Hardesty +5 more | 2020-04-14 |