Issued Patents All Time
Showing 26–39 of 39 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8307952 | Elevator system with multiple cars in a hoistway | Richard N. Fargo, Frank Sansevero, Boris G. Traktovenko, John M. Milton-Benoit, David J. Sirag, Jr. +2 more | 2012-11-13 |
| 8292038 | Control device for operating two elevator cars in a single hoistway | Richard C. McCarthy, Greg A. Schienda | 2012-10-23 |
| 8136635 | Method and system for maintaining distance between elevator cars in an elevator system with multiple cars in a single hoistway | Theresa M. Christy, Randall Keith Roberts, Mauro J. Atalla, Arthur Hsu, CheongSik Shin +1 more | 2012-03-20 |
| 7987947 | Call indicator provided near elevator car currently assigned to the call | Theresa M. Christy, Jannah A. Stanley, Hideyuki Honma, Arthur Hsu, John M. Milton-Benoit +4 more | 2011-08-02 |
| 7917341 | Elevator system including multiple cars in a hoistway destination entry control and parking positions | Frank Sansevero | 2011-03-29 |
| 7819228 | Collison prevention in hoistway with two elevator cars | Greg A. Schienda, Frank Sansevero | 2010-10-26 |
| 7650966 | Elevator system including multiple cars in a hoistway, destination entry control and parking positions | Frank Sansevero | 2010-01-26 |
| 7377363 | Elevator with variable drag for car and counterweight | Michael P. Flynn | 2008-05-27 |
| 7322446 | Elevator call assignment indications for multiple elevators in each of a plurality of elevator hoistways | Frank Sansevero, Theresa M. Christy, Arthur Hsu | 2008-01-29 |
| 5984051 | Remote elevator call requests with descriptor tags | Robert G. Morgan, David Crenella, Bruce Zepke, Eric K. Jamieson | 1999-11-16 |
| 5635689 | Acceleration damping of elevator resonant modes and hydraulic elevator pump leakage compensation | Mark Eugene Shepard, Richard N. Fargo | 1997-06-03 |
| 4726450 | Hydraulic elevator with dynamically programmed motor-operated valve | Giorgio Fossati, Giuseppe Manco | 1988-02-23 |
| 4700748 | Pressure-referenced programmed flow control in a hydraulic valve | Giorgio Fossati, Giuseppe Manco | 1987-10-20 |
| 4674527 | Pressure relieving linear motion valve | Giorgio Fossati, Giuseppe Manco | 1987-06-23 |