WD

William J. Derwin

OE Otis Elevator: 1 patents #50 of 167Top 30%
Overall (2017): #198,833 of 506,227Top 40%
1
Patents 2017

Issued Patents 2017

Patent #TitleCo-InventorsDate
9604823 Assembly for roping an elevator Valery Sheynkman, Richard S. Blakelock, Troy R. Chicoine, Douglas B. LaBrecque, Craig A. Buckley 2017-03-28