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USPTO Patent Rankings Data through Sept 30, 2025
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Shihemn Chen — 3 Patents in 2021

OEOtis Elevator: 3 patents #25 of 253Top 10%
Northville, MI: #18 of 189 inventorsTop 10%
Michigan: #971 of 9,874 inventorsTop 10%
Overall (2021): #63,649 of 548,734Top 15%
3 Patents 2021

Issued Patents 2021

Showing 1–3 of 3 patents

Patent #TitleCo-InventorsDate
10988348 Escalator steps with strain sensors Walter Thomas Schmidt, Charles C. Coffin, Enrico Manes, Paul R. Braunwart, Anais Espinal +2 more 2021-04-27
10927915 Spring useful for elevator safety device Enrico Manes, Robert A. Barth, Xiaodong Luo, Daryl J. Marvin, Michael A. Klecka +1 more 2021-02-23
10899580 Elevator cab suspension assembly for a double deck elevator Walter Thomas Schmidt, Enrico Manes, Zaffir A. Chaudhry, Xiaodong Luo, Luke A. Mishler +4 more 2021-01-26