Inventor · disambiguated record
Christian Holzapfel
Also filed as: HOLZAPFEL CHRISTIAN
21 granted patents·1 pending application·44 citations·filing 1980–2023
91Inventor score
Files withSCHLEIFRING GMBH7SCHLEIFRING UND APPBAU GMBH7AUDI AG4KNORR BREMSE SYSTEME2KERNFORSCHUNGSANLAGE JUELICH1
Top patents by PatentIndex Score
22 records- 0176US9490600B2High current slipring for multi fiber brushesSCHLEIFRING UND APPBAU GMBH·Filed 2015·Granted Nov 8, 2016·4 cites·13 claims
- 0259US11970052B2Drive device for a vehicle axle of a vehicleAUDI AG·Filed 2020·Granted Apr 30, 2024·0 cites·13 claims
- 0358US9780513B2Slip ring assembly and components thereofSCHLEIFRING UND APPBAU GMBH·Filed 2016·Granted Oct 3, 2017·2 cites·8 claims
- 0455US10601272B2Rotor for an electrical machine, electrical machine, in particular an asynchronous machine for a motor vehicle, and motor vehicleAUDI AG·Filed 2017·Granted Mar 24, 2020·0 cites·11 claims
- 0555US9124055B2Oscillation proof brushblock for slipringsSCHLEIFRING UND APPBAU GMBH·Filed 2013·Granted Sep 1, 2015·3 cites·16 claims
- 0653US9093808B2Vibration-resistant slip ring deviceSCHLEIFRING UND APPBAU GMBH·Filed 2013·Granted Jul 28, 2015·2 cites·11 claims
- 0752US8986053B2Slip ring brush and holder for slip ring brushSCHLEIFRING UND APPBAU GMBH·Filed 2013·Granted Mar 24, 2015·3 cites·12 claims
- 0852US4356830ACleansing apparatus for test-vesselsKERNFORSCHUNGSANLAGE JUELICH·Filed 1980·Granted Nov 2, 1982·12 cites·10 claims
- 0950US11171457B2Holder for slip ring brushesSCHLEIFRING GMBH·Filed 2021·Granted Nov 9, 2021·0 cites·56 claims
- 1048US9882331B2Low cost gold wire brushesSCHLEIFRING AND APPBAU GMBH·Filed 2013·Granted Jan 30, 2018·1 cites·14 claims
- 1147US12257894B2Drive device for a vehicle axleAUDI AG·Filed 2022·Granted Mar 25, 2025·0 cites·11 claims
- 1247US10734775B2Slip ring with selective wear indicationSCHLEIFRING GMBH·Filed 2019·Granted Aug 4, 2020·0 cites·15 claims
- 1344US10505329B2Method for making contact wires for slipringsSCHLEIFRING GMBH·Filed 2017·Granted Dec 10, 2019·0 cites·10 claims
- 1444US10355561B2Slipring with active coolingSCHLEIFRING GMBH·Filed 2016·Granted Jul 16, 2019·0 cites·18 claims
- 1544US9413127B2Self-lubricating slipringSCHLEIFRING UND APPBAU GMBH·Filed 2015·Granted Aug 9, 2016·0 cites·22 claims
- 1644US2025189029A1Drive device for a vehicle axleAUDI AG·Filed 2023·Application pending·0 cites
- 1742US11217952B2Slip ring moduleSCHLEIFRING GMBH·Filed 2019·Granted Jan 4, 2022·0 cites·20 claims
- 1841US10666004B2Slipring with reduced contact noiseSCHLEIFRING GMBH·Filed 2017·Granted May 26, 2020·0 cites·16 claims
- 1941US9640928B2Slip ring brush having a galvanic multi-layer systemSCHLEIFRING UND APPBAU GMBH·Filed 2014·Granted May 2, 2017·0 cites·12 claims
- 2039US6062833ASpiral compressor, useful in particular to generate compressed air for rail vehiclesKNORR BREMSE SYSTEME·Filed 1996·Granted May 16, 2000·10 cites·20 claims
- 2137US6017204ASpiral compressor, useful in particular to generate compressed air for rail vehiclesKNORR BREMSE SYSTEME·Filed 1996·Granted Jan 25, 2000·7 cites·7 claims
- 2236US11658449B2Slipring with wear monitoringSCHLEIFRING GMBH·Filed 2017·Granted May 23, 2023·0 cites·9 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →