Inventor
SPECKHART GREGORY J
US12 patents
⚠️ This page may combine multiple inventors who share the name “SPECKHART GREGORY J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
CATERPILLAR INC
11 patentsUS8004226B2Aug 23, 2011
Method and system for detecting a failed current sensor in a three-phase machine
CATERPILLAR INC13 citations81
US7511449B2Mar 31, 2009
Electric motor system implementing vector and slip control
CATERPILLAR INC11 citations80
US6508107B2Jan 21, 2003
Method and apparatus for determining an oil grade of an actuating fluid
CATERPILLAR INC8 citations72
US9729008B2Aug 8, 2017
Life degradation mitigation for transient response energy storage
CATERPILLAR INC6 citations71
US9722445B2Aug 1, 2017
Control of hybrid energy storage system for high pulse load
CATERPILLAR INC4 citations70
US6715467B2Apr 6, 2004
Method and apparatus for engine braking
CATERPILLAR INC3 citations61
US6415652B1Jul 9, 2002
Method and apparatus for determining an oil grade of an actuating fluid
CATERPILLAR INC3 citations61
US8946915B2Feb 3, 2015
Adaptive variable speed genset control
CATERPILLAR INC3 citations60
US11894682B2Feb 6, 2024
Methods and systems for off-grid load stabilization of energy distribution systems
CATERPILLAR INC1 citations59
US12066502B2Aug 20, 2024
Open phase detection
CATERPILLAR INC0 citations50
US12431815B2Sep 30, 2025
Start-up control for multilevel dual active bridge converter
CATERPILLAR INC0 citations42