David R. Polak — 2 Patents in 2017

OEOtis Elevator: 2 patents #22 of 167Top 15%

Glastonbury, CT: #22 of 110 inventorsTop 20%

Connecticut: #645 of 3,711 inventorsTop 20%

Overall (2017): #159,296 of 506,227Top 35%

2 Patents 2017

Issued Patents 2017

Showing 1–2 of 2 patents

Patent #	Title	Co-Inventors	Date
9815667	Coated sheave	Xiaomei Yu, Yan Chen, Daniel V. Viens, John P. Wesson	2017-11-14
9630806	Sheave for an elevator system	John P. Wesson, Xiaomei Yu	2017-04-25