Inventor · disambiguated record
Michael J. Karagoulis
Also filed as: KARAGOULIS MICHAEL J
44 granted patents·6 pending applications·275 citations·filing 2004–2022
97Inventor score
Files withGM GLOBAL TECH OPERATIONS LLC39SIGLER DAVID R9GM GLOBAL TECH OPERATIONS INC1WANG PEI-CHUNG1
Top patents by PatentIndex Score
50 records- 0198US8525066B2Electrode for spot weldingSIGLER DAVID R·Filed 2009·Granted Sep 3, 2013·35 cites·14 claims
- 0297US8436269B2Welding electrode with contoured faceSIGLER DAVID R·Filed 2006·Granted May 7, 2013·46 cites·4 claims
- 0397US8274010B2Welding electrode with contoured faceSIGLER DAVID R·Filed 2010·Granted Sep 25, 2012·33 cites·18 claims
- 0496US8222560B2Weld electrode for attractive weld appearanceSIGLER DAVID R·Filed 2009·Granted Jul 17, 2012·46 cites·17 claims
- 0594US9676065B2Resistance spot welding of aluminum to aluminum and steel to steelGM GLOBAL TECH OPERATIONS LLC·Filed 2012·Granted Jun 13, 2017·14 cites·20 claims
- 0694US9346118B2Forming and re-forming welding electrodes with contoured facesSIGLER DAVID R·Filed 2010·Granted May 24, 2016·11 cites·13 claims
- 0794US8927894B2Weld electrode for attractive weld appearanceSIGLER DAVID R·Filed 2008·Granted Jan 6, 2015·18 cites·16 claims
- 0893US10335892B2Weld electrode for attractive weld appearanceGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Jul 2, 2019·4 cites·20 claims
- 0993US9914599B2Systems, processes and apparatuses for automated handling of non-ferrous metal objectsGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Mar 13, 2018·5 cites·20 claims
- 1089US10682724B2Resistance spot welding of aluminum-to-aluminum, aluminum-to-steel, and steel-to-steel in a specified sequence and using a coverGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Jun 16, 2020·3 cites·13 claims
- 1189US10052710B2Resistance spot welding steel and aluminum workpieces using electrode weld face coverGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Aug 21, 2018·7 cites·16 claims
- 1289US9440305B2Method of resistance spot welding aluminum alloy workpiecesGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Sep 13, 2016·6 cites·14 claims
- 1389US8833215B2Cutting tool for forming and re-forming welding electrodes with contoured facesSIGLER DAVID R·Filed 2012·Granted Sep 16, 2014·8 cites·17 claims
- 1488US10766095B2Mating electrodes for resistance spot welding of aluminum workpieces to steel workpiecesGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Sep 8, 2020·3 cites·18 claims
- 1588US10259071B2Resistive welding electrode and method for spot welding steel and aluminum alloy workpieces with the resistive welding electrodeGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Granted Apr 16, 2019·3 cites·20 claims
- 1686US7265313B2Method and apparatus for improved cooling of resistance welding capGM GLOBAL TECH OPERATIONS INC·Filed 2005·Granted Sep 4, 2007·10 cites·22 claims
- 1785US10010966B2Electrode for resistance spot welding of dissimilar metalsGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Jul 3, 2018·4 cites·15 claims
- 1882US11084119B2Electrode for resistance spot welding of dissimilar materialsGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Aug 10, 2021·1 cites·19 claims
- 1981US11383319B2Method of joining steel having different resistivitiesGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Jul 12, 2022·1 cites·20 claims
- 2078US10610956B2Welding electrode cutting tool and method of using the sameGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Apr 7, 2020·2 cites·17 claims
- 2178US9682439B2Welding electrode with contoured faceGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Jun 20, 2017·3 cites·10 claims
- 2277US9737956B2Resistance spot welding thin gauge steelsGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Aug 22, 2017·3 cites·16 claims
- 2375US11224933B2Weld gun cap dresser cutterGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Jan 18, 2022·1 cites·20 claims
- 2474US10245675B2Multi-stage resistance spot welding method for workpiece stack-up having adjacent steel and aluminum workpiecesGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Apr 2, 2019·1 cites·20 claims
- 2574US9999938B2Multi-step direct welding of an aluminum-based workpiece to a steel workpieceGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Jun 19, 2018·2 cites·18 claims
- 2671US8415582B2Method for monitoring and maintaining a resistance welding apparatusWANG PEI-CHUNG·Filed 2010·Granted Apr 9, 2013·2 cites·7 claims
- 2770US9908199B2Programmable polarity module for DC resistance spot weldingGM GLOBAL TECH OPERATIONS LLC·Filed 2014·Granted Mar 6, 2018·1 cites·13 claims
- 2869US11752566B2Steel workpiece comprising an alloy substrate and a coating, and a method of spot welding the sameGM GLOBAL TECH OPERATIONS LLC·Filed 2022·Granted Sep 12, 2023·0 cites·11 claims
- 2969US9969026B2Weld schedule for resistance spot welding of aluminum alloy workpiecesSIGLER DAVID R·Filed 2011·Granted May 15, 2018·1 cites·20 claims
- 3066US11045894B2Weld schedule for resistance spot welding of aluminum alloy workpiecesGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Jun 29, 2021·0 cites·10 claims
- 3165US10940557B2Programmable polarity module for DC resistance spot weldingGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Mar 9, 2021·0 cites·18 claims
- 3264US11590601B2Method of joining steel work-pieces having different gauge ratiosGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Feb 28, 2023·0 cites·6 claims
- 3364US11548091B2Pretreatment of weld flanges to mitigate liquid metal embrittlement cracking in resistance welding of galvanized steelsGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Jan 10, 2023·0 cites·17 claims
- 3464US10981243B2Multi-step direct welding of an aluminum-based workpiece to a steel workpieceGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Apr 20, 2021·0 cites·17 claims
- 3563US10456856B2Welding electrode cutting tool and method of using the sameGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Oct 29, 2019·1 cites·18 claims
- 3662US11433646B2Metallic component and method of reducing liquid metal embrittlement using low aluminum zinc bathGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Granted Sep 6, 2022·0 cites·16 claims
- 3761US11441039B2High temperature coatings to mitigate weld cracking in resistance weldingGM GLOBAL TECH OPERATIONS LLC·Filed 2020·Granted Sep 13, 2022·0 cites·8 claims
- 3860US2016354857A1Method of resistance spot welding aluminum alloy workpiecesGM GLOBAL TECH OPERATIONS LLC·Filed 2016·Application pending·0 cites
- 3958US9925617B2Electrode for spot weldingGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Mar 27, 2018·0 cites·20 claims
- 4054US2006134449A1Weldable metal composites and methodsSIGLER DAVID R·Filed 2004·Application pending·0 cites
- 4153US10981244B2Resistance welding electrodeGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Apr 20, 2021·0 cites·15 claims
- 4252US11318548B2Resistance spot brazing workpiece stack-ups having one or more thin-gauge steel workpiecesGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted May 3, 2022·0 cites·19 claims
- 4351US2020406388A1Method of resistance welding zinc coated steelGM GLOBAL TECH OPERATIONS LLC·Filed 2019·Application pending·0 cites
- 4450US10335891B2Weld face design for spot weldingGM GLOBAL TECH OPERATIONS LLC·Filed 2013·Granted Jul 2, 2019·0 cites·12 claims
- 4549US11524358B2Mechanical performance of al-steel weld jointsGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Granted Dec 13, 2022·0 cites·11 claims
- 4647US2020055139A1Manufacturing method for welding a multi-sheet assemblyGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Application pending·0 cites
- 4747US2020016679A1Pretreatment of weld flanges to mitigate liquid metal embrittlement cracking in resistance welding of galvanized steelsGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Application pending·0 cites
- 4846US10675704B2Alternately direct resistance spot welding of Al-to-Al, al-to-steel, and steel-to-steel with welding electrode having oxide-disrupting structural featuresGM GLOBAL TECH OPERATIONS LLC·Filed 2017·Granted Jun 9, 2020·0 cites·16 claims
- 4946US2019314915A1Resistance Spot Welding Workpiece Stack-Ups Having Steel Workpieces With Surface CoatingsGM GLOBAL TECH OPERATIONS LLC·Filed 2018·Application pending·0 cites
- 5042US10272515B2Power pulse method for controlling resistance weld nugget growth and properties during steel spot weldingGM GLOBAL TECH OPERATIONS LLC·Filed 2015·Granted Apr 30, 2019·0 cites·16 claims
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