Issued Patents All Time
Showing 25 most recent of 28 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9010499 | Multi-car elevator hoistway separation assurance | Richard C. McCarthy, Randall Keith Roberts, Greg A. Schienda, Harold Terry, Gilbert W. Wierschke | 2015-04-21 |
| 7575099 | Remotely resettable ropeless emergency stopping device for an elevator | Jae-Hyuk Oh, Robin Mihekun Miller, Samuel C. Wan, Anthony Cooney, Adriana Bacellar +1 more | 2009-08-18 |
| 6981575 | Concrete rail safety device for an elevator car | Frederick H. Barker | 2006-01-03 |
| 6578673 | Concrete elevator rail and guidance system | Frederick H. Barker, Gilbert W. Wierschke | 2003-06-17 |
| 6038980 | Transferring freight or passenger cabs between moving bogies | Joseph Bittar, Frederick H. Barker, Anthony Cooney, David I. Perl, Michael D. Silverberg | 2000-03-21 |
| 5880414 | Elevator door brake, brake, lock, and hold-open | Jerome F. Jaminet, Thomas M. Kowalczyk, Frank Guliuzza, Jr., Edward E. Ahigian, Richard E. Kulak +3 more | 1999-03-09 |
| 5857545 | Elevator system with overlapped roped-coupler segments | David W. Barrett, John F. Cassidy, Jr., George A. L. David, Ernest P. Gagnon | 1999-01-12 |
| 5816368 | Elevator cars switch hoistways while traveling vertically | David W. Barrett, John F. Cassidy, Jr., George A. L. David, Ernest P. Gagnon, Andrew F. Peruggi | 1998-10-06 |
| 5808246 | Triac drive for three-phase line-powered linear induction motor elevator door operator | Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He, Thomas M. Kowalczyk +3 more | 1998-09-15 |
| 5736693 | Elevator door drive using dual secondary linear induction motor | Zbigniew Piech, Jerome F. Jaminet, Thomas M. Kowalczyk, Edward E. Ahigian, Richard E. Kulak +3 more | 1998-04-07 |
| 5732796 | Elevator car evacuation deterrent device | Edward E. Ahigian, David W. Barrett, Thomas M. McHugh, Jerome F. Jaminet, Thomas He +2 more | 1998-03-31 |
| 5682023 | Time-optimal control of an AC line-driven linear motor elevator door operator | Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He, Thomas M. Kowalczyk +2 more | 1997-10-28 |
| 5669465 | Elevator hoistway door bolt lock | Richard E. Kulak, Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +2 more | 1997-09-23 |
| 5668355 | Elevator cab door drive system | Jerome F. Jaminet, Thomas M. Kowalczyk, Edward E. Ahigian, Thomas M. McHugh, Thomas He +2 more | 1997-09-16 |
| 5651428 | Stationary actuator moving vane elevator car door coupling | Edward E. Ahigian, David W. Barrett, Thomas M. McHugh, Jerome F. Jaminet, Thomas He +2 more | 1997-07-29 |
| 5651427 | Elevator door coupling and hold-close apparatus | Richard E. Kulak, Edward E. Ahigian, Thomas M. McHugh, Jerome F. Jaminet, Thomas He +2 more | 1997-07-29 |
| 5612518 | Linear induction motor door drive assembly for elevators | Jerome F. Jaminet, Zbigniew Piech, Frank Guliuzza, Jr., Thomas M. McHugh, Edward E. Ahigian +4 more | 1997-03-18 |
| 5538106 | Rotationally stiff elevator car door coupling | Thomas M. McHugh, Thomas M. Kowalczyk, Richard E. Kulak, Thomas He, Edward E. Ahigian +2 more | 1996-07-23 |
| 5509504 | Velocity regulated, open current loop, variable voltage, variable frequency, linear induction motor drive for an elevator car door | Thomas M. McHugh, David W. Barrett, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +2 more | 1996-04-23 |
| 5503248 | Maintaining open loop current drive to linear induction motor | Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He, Thomas M. Kowalczyk +2 more | 1996-04-02 |
| 5495918 | Smooth and quiet linear induction motor elevator door operation | Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He, Thomas M. Kowalczyk +2 more | 1996-03-05 |
| 5494137 | Elevator door mounting system | Thomas M. Kowalczyk, Jerome F. Jaminet, Thomas M. McHugh, Edward E. Ahigian, Thomas He +2 more | 1996-02-27 |
| 5487449 | Magnetic elevator door coupling | David W. Barrett, Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +2 more | 1996-01-30 |
| 5485896 | Rotary elevator car door coupling | Thomas M. Kowalczyk, Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +2 more | 1996-01-23 |
| 5454447 | Elevator hoistway door bolt lock | Richard E. Kulak, Thomas M. McHugh, Edward E. Ahigian, Jerome F. Jaminet, Thomas He +2 more | 1995-10-03 |