| 11203510 |
Electrohydraulic damper for elevator system |
Tadeusz Pawel Witczak, Cezary Jedryczka, Wojciech Szelag |
2021-12-21 |
| 11146140 |
Universal electromagnetic machine |
Tadeusz Pawel Witczak, Zbigniew Piech, Wojciech Szelag, Cezary Jedryczka, Stella M. Oggianu |
2021-10-12 |
| 10958123 |
Electromagnetic machine |
Tadeusz Pawel Witczak, Stella M. Oggianu, Cezary Jedryczka, Wojciech Szelag, Zbigniew Piech |
2021-03-23 |
| 10865071 |
Configurable multicar elevator system |
Randall Keith Roberts, Zbigniew Piech, Cezary Jedryczka, Wojciech Szelag, Tadeusz Pawel Witczak +3 more |
2020-12-15 |
| 10752466 |
Transfer station for a ropeless elevator system with redundancy of subcomponents and parking zone |
Cezary Jedryczka, Tadeusz Pawel Witczak, Zbigniew Piech, Bruce P. Swaybill, Wojciech Szelag +2 more |
2020-08-25 |
| 10745247 |
Elevator car guidance mechanism |
Tadeusz Pawel Witczak, Richard N. Fargo, Enrico Manes, Zbigniew Piech, Bruce P. Swaybill +2 more |
2020-08-18 |
| 9950902 |
Stator structure for self-propelled elevator |
Zbigniew Piech, Cezary Jedryczka, Wojciech Szelag |
2018-04-24 |