Inventor · disambiguated record
John Franklin Kral
Also filed as: KRAL JOHN F · KRAL JOHN FRANKLIN
9 granted patents·6 pending applications·51 citations·filing 2002–2017
82Inventor score
Files withPROGRESS RAIL SERVICES CORP5KRAL JOHN FRANKLIN4ELECTRO MOTIVE DIESEL INC2CATERPILLAR INC1GEN MOTORS CORP1
Top patents by PatentIndex Score
15 records- 0176US8596201B2Engine warming system for a multi-engine machineKRAL JOHN F·Filed 2011·Granted Dec 3, 2013·7 cites·20 claims
- 0274US6634303B1Locomotive wheel slip control and methodGEN MOTORS CORP·Filed 2002·Granted Oct 21, 2003·43 cites·7 claims
- 0356US9697964B2Locomotive positive power bus contactor method of assemblyPROGRESS RAIL SERVICES CORP·Filed 2014·Granted Jul 4, 2017·0 cites·5 claims
- 0453US9071178B2Continuously variable dynamic brake for a locomotivePROGRESS RAIL SERVICES CORP·Filed 2014·Granted Jun 30, 2015·1 cites·5 claims
- 0548US8933359B2Locomotive positive power bus contactor method of assemblyKRAL JOHN FRANKLIN·Filed 2012·Granted Jan 13, 2015·0 cites·15 claims
- 0647US9118178B2Traction motor drive system for a locomotivePROGRESS RAIL SERVICES CORP·Filed 2014·Granted Aug 25, 2015·0 cites·5 claims
- 0744US8823293B2Traction motor drive system for a locomotiveKRAL JOHN FRANKLIN·Filed 2011·Granted Sep 2, 2014·0 cites·9 claims
- 0841US8820248B2Continuously variable dynamic brake for a locomotiveKRAL JOHN FRANKLIN·Filed 2011·Granted Sep 2, 2014·0 cites·8 claims
- 0939US2013284529A1Cooling system for mobile machineKRAL JOHN FRANKLIN·Filed 2012·Application pending·0 cites
- 1039US2014318410A1Locomotive with variable power modulesPROGRESS RAIL SERVICES CORP·Filed 2013·Application pending·0 cites
- 1138US9719434B2Locomotive control system having thermal managementELECTRO MOTIVE DIESEL INC·Filed 2015·Granted Aug 1, 2017·0 cites·18 claims
- 1236US2014379180A1Power sharing for a locomotive consistPROGRESS RAIL SERVICES CORP·Filed 2013·Application pending·0 cites
- 1335US2016236693A1Electric power supply system for machineCATERPILLAR INC·Filed 2016·Application pending·0 cites
- 1435US2016265412A1Method of controlling exhaust emission of machineELECTRO MOTIVE DIESEL INC·Filed 2016·Application pending·0 cites
- 1531US2019063393A1Warm up system for an engine of a machinePROGRESS RAILSERVICES CORP·Filed 2017·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →