JC

Jeffrey Michael Calkins

ER Energy Recovery: 2 patents #23 of 50Top 50%
📍 Petersburg, MI: #19 of 41 inventorsTop 50%
🗺 Michigan: #35,034 of 86,293 inventorsTop 45%
Overall (All Time): #1,984,188 of 4,157,543Top 50%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
9683574 Debris resistant thrust bearing assembly for high speed hydraulic centrifugal turbines and pumps Felix Winkler 2017-06-20
8834028 Debris resistant thrust bearing assembly for high speed hydraulic centrifugal turbines and pumps Felix Winkler 2014-09-16