WD

William J. Derwin

OE Otis Elevator: 3 patents #506 of 1,840Top 30%
Overall (All Time): #1,490,533 of 4,157,543Top 40%
3
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
10364128 Method of installing a vertically extending member in an elevator system Valery Sheynkman, Richard S. Blakelock, Troy R. Chicoine, Douglas B. LaBrecque, Craig A. Buckley 2019-07-30
9604823 Assembly for roping an elevator Valery Sheynkman, Richard S. Blakelock, Troy R. Chicoine, Douglas B. LaBrecque, Craig A. Buckley 2017-03-28
8714537 Lifting device clamp having a curvilinear surface Jeffrey A. Smith, Jeffrey Dickinson, John E. Cegelka, Craig A. Buckley 2014-05-06