DP

David R. Polak

OE Otis Elevator: 1 patents #73 of 258Top 30%
Overall (2023): #470,239 of 537,848Top 90%
1
Patents 2023

Issued Patents 2023

Patent #TitleCo-InventorsDate
11643301 System and method for monitoring sheave bearing condition Yan Chen, Paul R. Braunwart, Zaffir A. Chaudhry, Charles C. Coffin 2023-05-09