DT

David R. Torlai

OE Otis Elevator: 10 patents #143 of 1,840Top 8%
KU Koyo Bearings Usa: 2 patents #2 of 17Top 15%
TT The Torrington: 1 patents #127 of 265Top 50%
Overall (All Time): #364,896 of 4,157,543Top 9%
13
Patents All Time

Issued Patents All Time

Patent #TitleCo-InventorsDate
12358203 Elevator load bearing suspension member including a corrosion inhibitor in the jacket Brad Guilani 2025-07-15
12103822 Elevator system safety brake Girija Marathe 2024-10-01
11261062 Modular sheave unit Jun Ma 2022-03-01
11254544 Friction liner and traction sheave James L. Hubbard, Peter Keyo 2022-02-22
11111108 Coated sheave Xiaoyuan Chang 2021-09-07
10822202 Unitized segmented sheave assembly Austin Lee, Jun Ma 2020-11-03
10766746 Friction liner and traction sheave James L. Hubbard, Peter Keyo 2020-09-08
10647547 Methods and apparatuses for applying a substrate onto an elevator sheave Xiaoyuan Chang, Peter Keyo, Lance L. Lavender, Hong Yang 2020-05-12
10023432 Guide rail for elevator Xiaoyuan Chang 2018-07-17
9701517 Methods and apparatuses for applying a substrate onto an elevator sheave Xiaoyuan Chang, Peter Keyo, Lance L. Lavender, Hong Yang 2017-07-11
8182157 Thrust bearing assembly Charles W. Shattuck, Richard F. Murphy 2012-05-22
7845857 Thrust bearing assembly Charles W. Shattuck, Richard F. Murphy 2010-12-07
6293168 Stamped rocker arms for machines such as internal combustion engines Eric Hanniger 2001-09-25