Inventor

DUFRESNE RANDY L

US3 patents

⚠️ This page may combine multiple inventors who share the name “DUFRESNE RANDY L”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

GM GLOBAL TECH OPERATIONS INC

1 patent

US8353154B2Jan 15, 2013

Thermally efficient exhaust treatment system for an internal combustion engine

GM GLOBAL TECH OPERATIONS INC5 citations65

GM GLOBAL TECH OPERATIONS LLC

1 patent

US11098666B1Aug 24, 2021

System and method for controlling amount of sulfur on three-way catalyst by limiting deceleration cylinder cut off

GM GLOBAL TECH OPERATIONS LLC0 citations60

GEN MOTORS CORP

1 patent

US7035730B2Apr 25, 2006

Method for diagnosing catalytic converter performance

GEN MOTORS CORP3 citations59