Inventor · disambiguated record
Randy L. Dufresne
Also filed as: DUFRESNE RANDY L
3 granted patents·1 pending application·8 citations·filing 2004–2020
59Inventor score
Files withGEN MOTORS CORP1GM GLOBAL TECH OPERATIONS INC1GM GLOBAL TECH OPERATIONS LLC1SANTOSO HALIM G1
Top patents by PatentIndex Score
4 records- 0170US8353154B2Thermally efficient exhaust treatment system for an internal combustion engineGM GLOBAL TECH OPERATIONS INC·Filed 2010·Granted Jan 15, 2013·5 cites·10 claims
- 0260US11098666B1System and method for controlling amount of sulfur on three-way catalyst by limiting deceleration cylinder cut offGM GLOBAL TECH OPERATIONS LLC·Filed 2020·Granted Aug 24, 2021·0 cites·20 claims
- 0338US7035730B2Method for diagnosing catalytic converter performanceGEN MOTORS CORP·Filed 2004·Granted Apr 25, 2006·3 cites·27 claims
- 0436US2011296820A1Engine exhaust gas treatment device including electrically actuated hydrocarbon adsorber bypass valveSANTOSO HALIM G·Filed 2010·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →