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USPTO Patent Rankings Data through Sept 30, 2025
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Charles C. Coffin — 2 Patents in 2021

OEOtis Elevator: 2 patents #46 of 253Top 20%
Vernon, CT: #13 of 64 inventorsTop 25%
Connecticut: #726 of 4,045 inventorsTop 20%
Overall (2021): #174,111 of 548,734Top 35%
2 Patents 2021

Issued Patents 2021

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11014780 Elevator sensor calibration Sudarshan N. Koushik, Paul R. Braunwart, Teems E. Lovett 2021-05-25
10988348 Escalator steps with strain sensors Walter Thomas Schmidt, Shihemn Chen, Enrico Manes, Paul R. Braunwart, Anais Espinal +2 more 2021-04-27