Inventor · disambiguated record
Brent Duffner
Also filed as: DUFFNER BRENT · DUFFNER BRENT ALAN
7 granted patents·3 pending applications·6 citations·filing 2006–2025
73Inventor score
Files withvoestalpine Railway Systems Nortrak LLC4VOESTALPINE NORTRAK INC3CLICK GARY1VAE NORTRAK NORTH AMERICA INC1VOESTALPINE RAILWAY SYSTEMS NORTRAK INC1
Top patents by PatentIndex Score
10 records- 0175US7677466B2Insulated rail joint assemblyVAE NORTRAK NORTH AMERICA INC·Filed 2006·Granted Mar 16, 2010·5 cites·28 claims
- 0260US2025320668A1Switch Point Roller Assemblyvoestalpine Railway Systems Nortrak LLC·Filed 2025·Application pending·0 cites
- 0355US12359377B1Switch point roller assemblyvoestalpine Railway Systems Nortrak LLC·Filed 2025·Granted Jul 15, 2025·0 cites·18 claims
- 0450US9290192B2Spring wing controllerVOESTALPINE NORTRAK INC·Filed 2013·Granted Mar 22, 2016·0 cites·19 claims
- 0548US10400397B2Boltless rail braceVOESTALPINE NORTRAK INC·Filed 2017·Granted Sep 3, 2019·0 cites·26 claims
- 0644US11168446B2Rail fastening apparatusvoestalpine Railway Systems Nortrak LLC·Filed 2017·Granted Nov 9, 2021·0 cites·3 claims
- 0742US2024392512A1Moveable Point Frog Friction-Reducing Assemblyvoestalpine Railway Systems Nortrak LLC·Filed 2023·Application pending·0 cites
- 0842US2010072326A1Integrated locking control and status indicator for manually operated railway switch standCLICK GARY·Filed 2008·Application pending·0 cites
- 0940US9352762B2Dual independent control hydraulic switch machineVOESTALPINE NORTRAK INC·Filed 2013·Granted May 31, 2016·0 cites·20 claims
- 1026USD910487SRailroad tieVOESTALPINE RAILWAY SYSTEMS NORTRAK INC·Filed 2019·Granted Feb 16, 2021·1 cites·1 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →