Inventor · disambiguated record
Lifeng Luo
Also filed as: LUO LIFENG · LUO LIFENG LARRY
50 granted patents·2 pending applications·1,911 citations·filing 1990–2023
99Inventor score
Top patents by PatentIndex Score
52 records- 0198US8581147B2Three stage power source for electric ARC weldingKOOKEN TODD E·Filed 2005·Granted Nov 12, 2013·76 cites·98 claims
- 0297US5695662APlasma arc cutting process and apparatus using an oxygen-rich gas shieldHYPERTHERM INC·Filed 1996·Granted Dec 9, 1997·167 cites·35 claims
- 0396US5380976AProcess for high quality plasma arc and laser cutting of stainless steel and aluminumHYPERTHERM INC·Filed 1993·Granted Jan 10, 1995·93 cites·13 claims
- 0496US5170033ASwirl ring and flow control process for a plasma arc torchHYPERTHERM INC·Filed 1991·Granted Dec 8, 1992·88 cites·14 claims
- 0595US9855620B2Welding system and method of weldingLINCOLN GLOBAL INC·Filed 2014·Granted Jan 2, 2018·16 cites·18 claims
- 0695US8269141B2Power source for electric arc weldingDANIEL JOSEPH A·Filed 2004·Granted Sep 18, 2012·72 cites·76 claims
- 0795US6705563B2Open shipyard wire feederLINCOLN GLOBAL INC·Filed 2002·Granted Mar 16, 2004·49 cites·77 claims
- 0894US7796005B2Power source for plasma deviceLINCOLN GLOBAL INC·Filed 2008·Granted Sep 14, 2010·23 cites·6 claims
- 0993US5396043APlasma arc cutting process and apparatus using an oxygen-rich gas shieldHYPERTHERM INC·Filed 1991·Granted Mar 7, 1995·110 cites·41 claims
- 1093US5317126ANozzle and method of operation for a plasma arc torchHYPERTHERM INC·Filed 1992·Granted May 31, 1994·133 cites·26 claims
- 1191US9751150B2Power source for electric arc weldingDANIEL JOSEPH A·Filed 2012·Granted Sep 5, 2017·8 cites·7 claims
- 1291US5070227AProceses and apparatus for reducing electrode wear in a plasma arc torchHYPERTHERM INC·Filed 1990·Granted Dec 3, 1991·82 cites·21 claims
- 1390US10744587B2Welding system and method of weldingLINCOLN GLOBAL INC·Filed 2017·Granted Aug 18, 2020·2 cites·16 claims
- 1490US5893985APlasma arc torchLINCOLN ELECTRIC CO·Filed 1997·Granted Apr 13, 1999·113 cites·73 claims
- 1590US5856647ADrag cup for plasma arc torchLINCOLN ELECTRIC CO·Filed 1997·Granted Jan 5, 1999·122 cites·17 claims
- 1689US5166494AProcess and apparatus for reducing electrode wear in a plasma arc torchHYPERTHERM INC·Filed 1991·Granted Nov 24, 1992·85 cites·32 claims
- 1787US8829869B2Dynamic power factor correction and dynamic control for converter in power supplyKOOKEN TODD·Filed 2011·Granted Sep 9, 2014·10 cites·20 claims
- 1884US8426772B2Auxiliary power supply for a welding machineLUO LIFENG LARRY·Filed 2009·Granted Apr 23, 2013·7 cites·18 claims
- 1984US5726415AGas cooled plasma torchLINCOLN ELECTRIC CO·Filed 1996·Granted Mar 10, 1998·102 cites·42 claims
- 2083US5653896AProcess for high quality plasma arc and laser cutting of stainless steel and aluminumHYPERTHERM INC·Filed 1996·Granted Aug 5, 1997·39 cites·20 claims
- 2182USD1023916SWireless chargerSHENZHEN AI INFINITE ELECTRONICS CO LTD·Filed 2022·Granted Apr 23, 2024·10 cites·1 claims
- 2281US8704130B2Auxiliary power supply for a welding machineLINCOLN GLOBAL INC·Filed 2013·Granted Apr 22, 2014·3 cites·20 claims
- 2381US5965040APlasma arc torchLINCOLN GLOBAL INC·Filed 1998·Granted Oct 12, 1999·67 cites·38 claims
- 2481US5591357APlasma arc cutting process and apparatus using an oxygen-rich gas shieldHYPERTHERM INC·Filed 1995·Granted Jan 7, 1997·71 cites·15 claims
- 2581US5464962AElectrode for a plasma arc torchHYPERTHERM INC·Filed 1994·Granted Nov 7, 1995·48 cites·20 claims
- 2679US6055161ASwitching type power supply for arc weldingLINCOLN GLOBAL INC·Filed 1999·Granted Apr 25, 2000·59 cites·42 claims
- 2778US6268587B1Current feedback device for electric arc welderLINCOLN GLOBAL INC·Filed 2000·Granted Jul 31, 2001·22 cites·39 claims
- 2877US9956639B2Modular power source for electric ARC welding and output chopperKOOKEN TODD E·Filed 2005·Granted May 1, 2018·5 cites·68 claims
- 2975US11673202B2Welding system and method of weldingLINCOLN GLOBAL INC·Filed 2020·Granted Jun 13, 2023·0 cites·20 claims
- 3075US7573000B2Power source for plasma deviceLINCOLN GLOBAL INC·Filed 2004·Granted Aug 11, 2009·12 cites·59 claims
- 3174US5601734AElectrode for a plasma arc torchHYPERTHERM INC·Filed 1995·Granted Feb 11, 1997·52 cites·20 claims
- 3273US5414236AProcess for high quality plasma arc cutting of stainless steel and aluminumHYPERTHERM INC·Filed 1992·Granted May 9, 1995·28 cites·14 claims
- 3371US5416297APlasma arc torch ignition circuit and methodHYPERTHERM INC·Filed 1993·Granted May 16, 1995·40 cites·12 claims
- 3470USD1062621SWireless chargerLUO LIFENG·Filed 2023·Granted Feb 18, 2025·3 cites·1 claims
- 3570US10668551B2High reliability modular welding power supply systemLINCOLN GLOBAL INC·Filed 2017·Granted Jun 2, 2020·1 cites·20 claims
- 3668US5548097APlasma arc cutting torch ignition circuit and method providing a forced arc transfer functionHYPERTHERM INC·Filed 1994·Granted Aug 20, 1996·30 cites·21 claims
- 3767US9839967B2System and method for real-time computation and reporting of welding machine performance and metricsKOOKEN TODD·Filed 2011·Granted Dec 12, 2017·1 cites·22 claims
- 3865US10857613B2System and method for real-time computation and reporting of welding machine performance and metricsLINCOLN GLOBAL INC·Filed 2017·Granted Dec 8, 2020·0 cites·20 claims
- 3963US9333584B2Modified phase shifted gate driveDODGE ROBERT L·Filed 2009·Granted May 10, 2016·1 cites·20 claims
- 4063US5558786AProcess for high quality plasma arc and laser cutting of stainless steel and aluminumHYPERTHERM INC·Filed 1994·Granted Sep 24, 1996·16 cites·17 claims
- 4163US5310988AElectrode for high current density plasma arc torchHYPERTHERM INC·Filed 1992·Granted May 10, 1994·32 cites·16 claims
- 4258USD1077740SWireless chargerSHENZHEN AI INFINITE ELECTRONICS CO LTD·Filed 2022·Granted Jun 3, 2025·2 cites·1 claims
- 4356USD988606SMakeup paletteLI DONG·Filed 2022·Granted Jun 6, 2023·1 cites·1 claims
- 4456US6995337B2Power source with saturable reactorLINCOLN GLOBAL INC·Filed 2003·Granted Feb 7, 2006·9 cites·35 claims
- 4553USD1002950SPractice board for makeupLI DONG·Filed 2022·Granted Oct 24, 2023·1 cites·1 claims
- 4650US8742295B2Inverter output rectifier circuitLUO LIFENG LARRY·Filed 2013·Granted Jun 3, 2014·0 cites·7 claims
- 4750US8742293B2Inverter output rectifier circuitLUO LIFENG LARRY·Filed 2013·Granted Jun 3, 2014·0 cites·6 claims
- 4847US10280972B2Groove-type dynamic pressure gas radial bearingLUO LIFENG·Filed 2015·Granted May 7, 2019·0 cites·5 claims
- 4946US10228015B2Hybrid dynamic pressure gas radial bearingLUO LIFENG·Filed 2015·Granted Mar 12, 2019·0 cites·13 claims
- 5044US2011000900A1Inverter output rectifier circuitLINCOLN GLOBAL INC·Filed 2009·Application pending·0 cites
Showing the top 50 of 52 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →