Issued Patents All Time
Showing 26–50 of 52 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5407029 | Elevator landing | Antoine Fritsch | 1995-04-18 |
| 5400872 | Counteracting horizontal accelerations on an elevator car | Clement A. Skalski, Richard L. Hollowell | 1995-03-28 |
| 5377783 | Elevator door drive | Antoine Fritsch | 1995-01-03 |
| 5368132 | Suspended elevator cab magnetic guidance to rails | Richard L. Hollowell | 1994-11-29 |
| 5322144 | Active control of elevator platform | Clement A. Skalski, Boris G. Traktovenko, Richard L. Hollowell | 1994-06-21 |
| 5308938 | Elevator active suspension system | Randall Keith Roberts, Richard L. Hollowell, Clement A. Skalski | 1994-05-03 |
| 5299662 | Linear motor elevator having hybrid roping and stationary primary | K. Narasimha Reddy | 1994-04-05 |
| 5294757 | Active vibration control system for an elevator, which reduces horizontal and rotational forces acting on the car | Clement A. Skalski, Boris G. Traktovenko, Richard L. Hollowell | 1994-03-15 |
| 5277276 | Compensating rope sheave tie down | Mukunda B. Pramanik | 1994-01-11 |
| 5199529 | Self aligning supports for elevator cab | — | 1993-04-06 |
| 5195616 | One to two stroke roped elevator pit buffers | Young S. Yoo | 1993-03-23 |
| 5186283 | Triple-wrap traction arrangement | — | 1993-02-16 |
| 5181586 | Noise and vibration reduction at elevator cab hitch | Young S. Yoo | 1993-01-26 |
| 5131504 | Elevator noise minimizer | Young S. Yoo, Keith Worsley | 1992-07-21 |
| 5080201 | Diversion of airflow around an elevator counterweight | Young S. Yoo, Joseph R. Faust | 1992-01-14 |
| 5046584 | Elevator occupant load weighing sensor mounting assembly | Young S. Yoo | 1991-09-10 |
| 5018602 | Reduction of noise and vibration in an elevator car by selectively reducing air turbulence | Young S. Yoo | 1991-05-28 |
| 4986391 | Elevator load weighing | — | 1991-01-22 |
| 4899852 | Elevator car mounting assembly | Young S. Yoo | 1990-02-13 |
| 4807723 | Elevator roping arrangement | William S. Edge | 1989-02-28 |
| 4593793 | Elevator door configuration | — | 1986-06-10 |
| 4548297 | Elevator car vibration control with friction damper | Young S. Yoo | 1985-10-22 |
| 4522285 | Hydraulic tie-down for elevators | Irving A. Hiller | 1985-06-11 |
| 4454931 | Elevator door operator having a variable pitch lead screw | Robert L. Leiner | 1984-06-19 |
| 4410067 | Elevator door operator | Robert L. Leiner | 1983-10-18 |