PW

Pawel Witczak

OE Otis Elevator: 3 patents #506 of 1,840Top 30%
Overall (All Time): #1,511,536 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
9457994 Method of assembling an elevator machine frame Zbigniew Piech, Stephen R. Nichols, Patricia L. Driesch, Benjamin J. Watson 2016-10-04
8776953 Magnetic elevator door coupler Hakki Han, Zbigniew Piech, David J. Lanesey 2014-07-15
8631907 Elevator machine frame Zbigniew Piech, Stephen R. Nichols, Patricia L. Driesch, Benjamin J. Watson 2014-01-21