Inventor
HOLZAPFEL CHRISTIAN
DE21 patents
⚠️ This page may combine multiple inventors who share the name “HOLZAPFEL CHRISTIAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SCHLEIFRING UND APPBAU GMBH
7 patentsUS9490600B2Nov 8, 2016
High current slipring for multi fiber brushes
SCHLEIFRING UND APPBAU GMBH4 citations72
US9780513B2Oct 3, 2017
Slip ring assembly and components thereof
SCHLEIFRING UND APPBAU GMBH2 citations63
US9093808B2Jul 28, 2015
Vibration-resistant slip ring device
SCHLEIFRING UND APPBAU GMBH2 citations59
US9124055B2Sep 1, 2015
Oscillation proof brushblock for sliprings
SCHLEIFRING UND APPBAU GMBH3 citations58
US8986053B2Mar 24, 2015
Slip ring brush and holder for slip ring brush
SCHLEIFRING UND APPBAU GMBH3 citations56
US9413127B2Aug 9, 2016
Self-lubricating slipring
SCHLEIFRING UND APPBAU GMBH0 citations51
US9640928B2May 2, 2017
Slip ring brush having a galvanic multi-layer system
SCHLEIFRING UND APPBAU GMBH0 citations40
SCHLEIFRING GMBH
7 patentsUS11171457B2Nov 9, 2021
Holder for slip ring brushes
SCHLEIFRING GMBH0 citations51
US10505329B2Dec 10, 2019
Method for making contact wires for sliprings
SCHLEIFRING GMBH0 citations51
US10355561B2Jul 16, 2019
Slipring with active cooling
SCHLEIFRING GMBH0 citations51
US11217952B2Jan 4, 2022
Slip ring module
SCHLEIFRING GMBH0 citations50
US10734775B2Aug 4, 2020
Slip ring with selective wear indication
SCHLEIFRING GMBH0 citations45
US11658449B2May 23, 2023
Slipring with wear monitoring
SCHLEIFRING GMBH0 citations44
US10666004B2May 26, 2020
Slipring with reduced contact noise
SCHLEIFRING GMBH0 citations29
AUDI AG
3 patentsUS11970052B2Apr 30, 2024
Drive device for a vehicle axle of a vehicle
AUDI AG0 citations61
US10601272B2Mar 24, 2020
Rotor for an electrical machine, electrical machine, in particular an asynchronous machine for a motor vehicle, and motor vehicle
AUDI AG0 citations51
US12257894B2Mar 25, 2025
Drive device for a vehicle axle
AUDI AG0 citations46