David R. Polak has been granted 8 US patents while listed as an inventor at Otis Elevator . The first was granted in 2012 and the most recent in November 2025. David R. Polak ranks #600,572 of 4,157,543 US inventors in our database (top 14.4%). Patent records list David R. Polak in Glastonbury, CT, US.
Patents per Year Patents granted per year, 2012 to 2023 Bar chart with a peak of 2 patents in 2017. peak 2 2012: 1 patents 2012 2017: 2 patents 2017 2019: 2 patents 2019 2020: 1 patents 2020 2023: 1 patents 2023
Issued Patents All Time
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Showing 1–8 of 8 patents
Patent # Title Co-Inventors Date Approx Value ⓘ
12479691 Elevator system Stephen R. Nichols , Matteo Rucco , Jose Miguel Pasini , Cecilia Tonelli , Andrea De Antoni 2025-11-25
11643301 System and method for monitoring sheave bearing condition Yan Chen , Paul R. Braunwart , Zaffir A. Chaudhry , Charles C. Coffin 2023-05-09
10773929 Sheave for elevator system Jun Ma , Peter Keyo , Brad Guilani , Gopal R. Krishnan , David J. Lanesey +2 more 2020-09-15
10336581 System and method for reducing belt noise Christopher T. Chipman , Charles C. Coffin , Arthur Blanc , John P. Wesson , Yan Chen +2 more 2019-07-02
10246300 Elevator virtual aerodynamic shroud Ray-Sing Lin , David E. Parekh , Mark S. Thompson 2019-04-02
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
8167540 System for reducing compressor noise Robert Hans Schlinker , James C. Napier , Ray-Sing Lin , Scott A. Liljenberg , Anthony C. Jones 2012-05-01
$17,729,000
