Issued Patents 1994
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5373123 | Electromagnetic gaging of elevator rails and other structures | — | 1994-12-13 |
| 5367132 | Centering control for elevator horizontal suspension | Boris G. Traktovenko | 1994-11-22 |
| 5329077 | Elevator ride quality | Randall Keith Roberts | 1994-07-12 |
| 5322144 | Active control of elevator platform | John K. Salmon, Boris G. Traktovenko, Richard L. Hollowell | 1994-06-21 |
| 5321217 | Apparatus and method for controlling an elevator horizontal suspension | Boris G. Traktovenko, Richard L. Hollowell | 1994-06-14 |
| 5308938 | Elevator active suspension system | Randall Keith Roberts, Richard L. Hollowell, John K. Salmon | 1994-05-03 |
| 5304751 | Elevator horizontal suspensions and controls | Boris G. Traktovenko | 1994-04-19 |
| 5294757 | Active vibration control system for an elevator, which reduces horizontal and rotational forces acting on the car | John K. Salmon, Boris G. Traktovenko, Richard L. Hollowell | 1994-03-15 |