Inventor
Hartshorn Jay
US10 patents
Patents
10 patentsUS10848092B2Nov 24, 2020
Electric motor protection using stator current and voltage measurements
SCHWEITZER ENGINEERING LAB INC2 citations71
US11381084B1Jul 5, 2022
Frequency measurement for load shedding and accurate magnitude calculation
SCHWEITZER ENGINEERING LAB INC2 citations70
US11754602B2Sep 12, 2023
Frequency sensing systems and methods
SCHWEITZER ENGINEERING LAB INC0 citations60
US11231449B2Jan 25, 2022
Frequency sensing systems and methods
SCHWEITZER ENGINEERING LAB INC0 citations60
US11018497B2May 25, 2021
In-phase motor bus transfer
SCHWEITZER ENGINEERING LAB INC1 citations60
US11218103B2Jan 4, 2022
Induction motor slip calculation
SCHWEITZER ENGINEERING LAB INC1 citations58
US11469588B2Oct 11, 2022
Electric power system differential protection with DC compensation
SCHWEITZER ENGINEERING LAB INC1 citations55
US12418168B2Sep 16, 2025
High-impedance differential protection using a diversity of signals
SCHWEITZER ENGINEERING LAB INC0 citations47
US12244135B2Mar 4, 2025
Differential protection using instrument transformer signal transducers
SCHWEITZER ENGINEERING LAB INC0 citations47
US12556358B2Feb 17, 2026
Adaptive clock offset estimation for protection devices without time-based synchronization
SCHWEITZER ENGINEERING LAB INC0 citations45