Inventor · disambiguated record
Friedrich Zapf
Also filed as: ZAPF FRIEDRICH · ZAPF FRIEDRICH J · ZAPF FRIEDRICH JOHANN
19 granted patents·2 pending applications·180 citations·filing 2000–2024
94Inventor score
Top patents by PatentIndex Score
21 records- 0191US10301996B2System and method for varying reductant delivery pressure to aftertreatment systemsCUMMINS EMISSION SOLUTIONS INC·Filed 2015·Granted May 28, 2019·5 cites·18 claims
- 0291US8201393B2Exhaust-gas aftertreatment deviceZAPF FRIEDRICH·Filed 2009·Granted Jun 19, 2012·25 cites·16 claims
- 0382US6336470B1Directional seat valveHYDRAULIK RING GMBH·Filed 2000·Granted Jan 8, 2002·24 cites·11 claims
- 0481US6578606B2Solenoid valve, in particular, a pressure control valveHYDRAULIK RING GMBH·Filed 2001·Granted Jun 17, 2003·25 cites·9 claims
- 0579US8266892B2Calibrated dosing unit, especially of an exhaust gas treatment unitZAPF FRIEDRICH·Filed 2008·Granted Sep 18, 2012·15 cites·8 claims
- 0679US6397891B1Hydraulic valve, in particular, adjustable pressure control valveHYDRAULIK RING GMBH·Filed 2000·Granted Jun 4, 2002·43 cites·13 claims
- 0778US8959895B2Exhaust-gas aftertreatment deviceZAPF FRIEDRICH·Filed 2012·Granted Feb 24, 2015·4 cites·23 claims
- 0877US8938949B2SCR exhaust gas aftertreatment deviceBRANCO ALEXANDRE·Filed 2010·Granted Jan 27, 2015·6 cites·23 claims
- 0974US12460566B2Dosing module for use in aftertreatment systems for internal combustion enginesCUMMINS EMISSION SOLUTIONS INC·Filed 2024·Granted Nov 4, 2025·0 cites·19 claims
- 1068US11143077B2System and method for varying reductant delivery pressure to aftertreatment systemsCUMMINS EMISSION SOLUTIONS INC·Filed 2019·Granted Oct 12, 2021·0 cites·21 claims
- 1167US12060822B2Dosing module for use in aftertreatment systems for internal combustion enginesCUMMINS EMISSION SOLUTIONS INC·Filed 2017·Granted Aug 13, 2024·1 cites·20 claims
- 1266US8875491B2Exhaust gas aftertreatment system and methodZAPF FRIEDRICH·Filed 2012·Granted Nov 4, 2014·3 cites·22 claims
- 1362US6814103B2Solenoid valve, in particular, a pressure control valveHYDRAULIK RING GMBH·Filed 2003·Granted Nov 9, 2004·9 cites·6 claims
- 1460US7089962B2Compensation device for compensating volumetric expansion of media, especially of a urea-water solution during freezingHYDRAULIK RING GMBH·Filed 2003·Granted Aug 15, 2006·10 cites·14 claims
- 1557US6390117B2Directional seat valveHYDRAULIK RING GMBH·Filed 2001·Granted May 21, 2002·9 cites·2 claims
- 1650US2025369383A1Doser assembly with sensor assemblyCUMMINS EMISSION SOLUTIONS INC·Filed 2023·Application pending·0 cites
- 1748US11465082B2Filtration assembly for use in aftertreatment systems for internal combustion enginesCUMMINS EMISSION SOLUTIONS INC·Filed 2018·Granted Oct 11, 2022·0 cites·18 claims
- 1848US2025376936A1Doser mount for exhaust aftertreatment systemCUMMINS EMISSION SOLUTIONS INC·Filed 2023·Application pending·0 cites
- 1944US6910465B2Throttle valve especially for high-pressure diesel pumps of injection devices of motor vehiclesHYDRAULIK RING GMBH·Filed 2003·Granted Jun 28, 2005·1 cites·20 claims
- 2037US7013877B2Pressure control valve, especially for high pressure diesel pumps of injection devices of motor vehiclesHYDRAULIK RING GMBH·Filed 2003·Granted Mar 21, 2006·0 cites·7 claims
- 2136US6833779B2Proportional solenoid valve, preferably proportional throttle valve, especially for high pressure diesel pumps of motor vehiclesHYDRAULIK RING GMBH·Filed 2003·Granted Dec 21, 2004·0 cites·29 claims
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