Patent Leaderboard
USPTO Patent Rankings Data through Sept 30, 2025
MK

Mark P. Krefta — 4 Patents

CECurtiss-Wright Electro-Mechanical: 4 patents #2 of 46Top 5%
Murrysville, PA: #208 of 521 inventorsTop 40%
Pennsylvania: #19,182 of 74,527 inventorsTop 30%
Overall (All Time): #1,222,557 of 4,157,543Top 30%
4 Patents All Time

Issued Patents All Time

Showing 1–4 of 4 patents

Patent #TitleCo-InventorsDate
8860342 System and method for controlling a permanent magnet motor Kalyan K. Sen 2014-10-14
8076881 System and method for controlling an electric motor David Hall 2011-12-13
6952086 Linear position sensing system and coil switching methods for closed-loop control of large linear induction motor systems David Hall, Kenneth M. Eichler, Jiing-Liang Wu, Robert E. Strickler, Michael B. Brennen 2005-10-04
6879075 Trapezoidal shaped magnet flux intensifier motor pole arrangement for improved motor torque density Raymond M. Calfo 2005-04-12