Inventor · disambiguated record
Paul Douglas Free
Also filed as: FREE PAUL · FREE PAUL D · FREE PAUL DOUGLAS
20 granted patents·3 pending applications·210 citations·filing 1989–2023
94Inventor score
Files withCUMMINS ENGINE CO INC7CUMMINS INC7ALTRATECH LTD3CUMMINS EMISSION SOLUTIONS INC2CUMMINS FILTRATION IP INC1
Top patents by PatentIndex Score
23 records- 0192US6289867B1Rotary engineCUMMINS ENGINE CO INC·Filed 2000·Granted Sep 18, 2001·50 cites·27 claims
- 0287US10544721B2Reductant delivery systems and methodsCUMMINS EMISSION SOLUTIONS INC·Filed 2017·Granted Jan 28, 2020·3 cites·20 claims
- 0386US5755101AElectronic turbocharger wastegate controllerCUMMINS ENGINE CO INC·Filed 1996·Granted May 26, 1998·58 cites·18 claims
- 0483US10480377B2System and method to improve aftertreatment in an internal combustion engineCUMMINS INC·Filed 2017·Granted Nov 19, 2019·3 cites·11 claims
- 0582US9291138B2Fuel injector with injection control valve assemblyCUMMINS INC·Filed 2012·Granted Mar 22, 2016·3 cites·17 claims
- 0682US8844492B2Air intake system for internal combustion engineCUMMINS INC·Filed 2013·Granted Sep 30, 2014·5 cites·11 claims
- 0777US11459601B2Diagnostic device and systemALTRATECH LTD·Filed 2018·Granted Oct 4, 2022·1 cites·25 claims
- 0869US2023094539A1Diagnostic device and systemALTRATECH LTD·Filed 2022·Application pending·0 cites
- 0966US6220234B1Coated compressor diffuserCUMMINS ENGINE CO INC·Filed 1999·Granted Apr 24, 2001·40 cites·24 claims
- 1065US9650925B2System and method of augmenting low oil pressure in an internal combustion engineFREE PAUL DOUGLAS·Filed 2012·Granted May 16, 2017·3 cites·19 claims
- 1162US2023242972A1Single-bead capacitive detector for microbiological applicationsALTRATECH LTD·Filed 2023·Application pending·0 cites
- 1261US11156144B2Reductant delivery systems and methodsCUMMINS EMISSION SOLUTIONS INC·Filed 2019·Granted Oct 26, 2021·0 cites·20 claims
- 1361US5024200AViscosity responsive pressure regulator and timing control tappet system incorporating the sameCUMMINS ENGINE CO INC·Filed 1989·Granted Jun 18, 1991·17 cites·19 claims
- 1460US9915191B2Air intake system for internal combustion engineCUMMINS INC·Filed 2017·Granted Mar 13, 2018·0 cites·9 claims
- 1551US9644590B2Fuel injection pressure pulsation dampening systemCUMMINS INC·Filed 2014·Granted May 9, 2017·0 cites·18 claims
- 1649US9605630B2Air intake system for internal combustion engineCUMMINS INC·Filed 2014·Granted Mar 28, 2017·0 cites·10 claims
- 1746US2013220900A1Filter communication and identification networkCUMMINS FILTRATION IP INC·Filed 2013·Application pending·0 cites
- 1845US5411003AViscosity sensitive auxiliary circuit for hydromechanical control valve for timing control of tappet systemCUMMINS ENGINE CO INC·Filed 1994·Granted May 2, 1995·11 cites·16 claims
- 1942US11603945B2Actuator and compact EGR valveSTANADYNE LLC·Filed 2021·Granted Mar 14, 2023·0 cites·7 claims
- 2042US11047281B2Temperature-based control of reagent distributionWATLOW ELECTRIC MFG·Filed 2018·Granted Jun 29, 2021·0 cites·19 claims
- 2142US10119496B2Cryogenic fuel injection and combustionCUMMINS INC·Filed 2015·Granted Nov 6, 2018·0 cites·15 claims
- 2240US5390851ASolenoid operated unit fuel injector with supply line backflow pressure relief valveCUMMINS ENGINE CO INC·Filed 1994·Granted Feb 21, 1995·8 cites·15 claims
- 2339US5558067ADouble pulsing electronic unit injector solenoid valve to fill timing chamber before metering chamberCUMMINS ENGINE CO INC·Filed 1995·Granted Sep 24, 1996·8 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →